diff --git a/keyboards/yandrstudio/eau87/board.h b/keyboards/yandrstudio/eau87/board.h
new file mode 100644
index 0000000000..d83804babd
--- /dev/null
+++ b/keyboards/yandrstudio/eau87/board.h
@@ -0,0 +1,21 @@
+/* Copyright 2022 JasonRen(biu)
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see .
+ */
+#pragma once
+
+#include_next "board.h"
+
+#undef STM32_HSECLK
+#define STM32_HSECLK 16000000
diff --git a/keyboards/yandrstudio/eau87/config.h b/keyboards/yandrstudio/eau87/config.h
new file mode 100644
index 0000000000..698b5ca141
--- /dev/null
+++ b/keyboards/yandrstudio/eau87/config.h
@@ -0,0 +1,27 @@
+/* Copyright 2022 JasonRen(biu)
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see .
+ */
+#pragma once
+#include "config_common.h"
+
+/* key matrix size */
+#define MATRIX_ROWS 6
+#define MATRIX_COLS 17
+
+/* COL2ROW or ROW2COL */
+#define DIODE_DIRECTION COL2ROW
+
+#define MATRIX_COL_PINS { A10, A9, A8, B15, B14, B13, B11, B10, B2, B1, B0, A7, A6, A5, A3, A15, B3 }
+#define MATRIX_ROW_PINS { B12, B5, B4, A4, B7, B6 }
diff --git a/keyboards/yandrstudio/eau87/eau87.c b/keyboards/yandrstudio/eau87/eau87.c
new file mode 100644
index 0000000000..6ab9edb788
--- /dev/null
+++ b/keyboards/yandrstudio/eau87/eau87.c
@@ -0,0 +1,16 @@
+/* Copyright 2022 JasonRen(biu)
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see .
+ */
+#include "eau87.h"
diff --git a/keyboards/yandrstudio/eau87/eau87.h b/keyboards/yandrstudio/eau87/eau87.h
new file mode 100644
index 0000000000..6810797837
--- /dev/null
+++ b/keyboards/yandrstudio/eau87/eau87.h
@@ -0,0 +1,34 @@
+/* Copyright 2022 JasonRen(biu)
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see .
+ */
+#pragma once
+#include "quantum.h"
+
+#define LAYOUT( \
+ K000, K002, K003, K004, K005, K006, K007, K008, K009, K010, K011, K012, K013, K014, K015, K016, \
+ K100, K101, K102, K103, K104, K105, K106, K107, K108, K109, K110, K111, K112, K113, K114, K115, K116, \
+ K200, K201, K202, K203, K204, K205, K206, K207, K208, K209, K210, K211, K212, K213, K214, K215, K216, \
+ K300, K301, K302, K303, K304, K305, K306, K307, K308, K309, K310, K311, K313, \
+ K400, K402, K403, K404, K405, K406, K407, K408, K409, K410, K411, K413, K415, \
+ K500, K501, K502, K506, K510, K511, K512, K513, K514, K515, K516 \
+ )\
+ { \
+ { K000, KC_NO, K002, K003, K004, K005, K006, K007, K008, K009, K010, K011, K012, K013, K014, K015, K016 }, \
+ { K100, K101, K102, K103, K104, K105, K106, K107, K108, K109, K110, K111, K112, K113, K114, K115, K116 }, \
+ { K200, K201, K202, K203, K204, K205, K206, K207, K208, K209, K210, K211, K212, K213, K214, K215, K216 }, \
+ { K300, K301, K302, K303, K304, K305, K306, K307, K308, K309, K310, K311, KC_NO, K313, KC_NO, KC_NO, KC_NO }, \
+ { K400, KC_NO, K402, K403, K404, K405, K406, K407, K408, K409, K410, K411, KC_NO, K413, KC_NO, K415, KC_NO }, \
+ { K500, K501, K502, KC_NO, KC_NO, KC_NO, K506, KC_NO, KC_NO, KC_NO, K510, K511, K512, K513, K514, K515, K516 } \
+}
diff --git a/keyboards/yandrstudio/eau87/info.json b/keyboards/yandrstudio/eau87/info.json
new file mode 100644
index 0000000000..f09f55c76b
--- /dev/null
+++ b/keyboards/yandrstudio/eau87/info.json
@@ -0,0 +1,464 @@
+{
+ "keyboard_name": "eau87",
+ "processor": "STM32F103",
+ "bootloader": "stm32duino",
+ "usb": {
+ "pid": "0xAAEB",
+ "device_version": "1.0.0"
+ },
+ "layouts": {
+ "LAYOUT": {
+ "layout": [
+ {
+ "label": "Esc",
+ "x": 0,
+ "y": 0
+ },
+ {
+ "label": "F1",
+ "x": 2,
+ "y": 0
+ },
+ {
+ "label": "F2",
+ "x": 3,
+ "y": 0
+ },
+ {
+ "label": "F3",
+ "x": 4,
+ "y": 0
+ },
+ {
+ "label": "F4",
+ "x": 5,
+ "y": 0
+ },
+ {
+ "label": "F5",
+ "x": 6.5,
+ "y": 0
+ },
+ {
+ "label": "F6",
+ "x": 7.5,
+ "y": 0
+ },
+ {
+ "label": "F7",
+ "x": 8.5,
+ "y": 0
+ },
+ {
+ "label": "F8",
+ "x": 9.5,
+ "y": 0
+ },
+ {
+ "label": "F9",
+ "x": 11,
+ "y": 0
+ },
+ {
+ "label": "F10",
+ "x": 12,
+ "y": 0
+ },
+ {
+ "label": "F11",
+ "x": 13,
+ "y": 0
+ },
+ {
+ "label": "F12",
+ "x": 14,
+ "y": 0
+ },
+ {
+ "label": "PrtSc",
+ "x": 15.25,
+ "y": 0
+ },
+ {
+ "label": "Scroll Lock",
+ "x": 16.25,
+ "y": 0
+ },
+ {
+ "label": "Pause",
+ "x": 17.25,
+ "y": 0
+ },
+ {
+ "label": "~",
+ "x": 0,
+ "y": 1.5
+ },
+ {
+ "label": "!",
+ "x": 1,
+ "y": 1.5
+ },
+ {
+ "label": "@",
+ "x": 2,
+ "y": 1.5
+ },
+ {
+ "label": "#",
+ "x": 3,
+ "y": 1.5
+ },
+ {
+ "label": "$",
+ "x": 4,
+ "y": 1.5
+ },
+ {
+ "label": "%",
+ "x": 5,
+ "y": 1.5
+ },
+ {
+ "label": "^",
+ "x": 6,
+ "y": 1.5
+ },
+ {
+ "label": "&",
+ "x": 7,
+ "y": 1.5
+ },
+ {
+ "label": "*",
+ "x": 8,
+ "y": 1.5
+ },
+ {
+ "label": "(",
+ "x": 9,
+ "y": 1.5
+ },
+ {
+ "label": ")",
+ "x": 10,
+ "y": 1.5
+ },
+ {
+ "label": "_",
+ "x": 11,
+ "y": 1.5
+ },
+ {
+ "label": "+",
+ "x": 12,
+ "y": 1.5
+ },
+ {
+ "label": "Backspace",
+ "x": 13,
+ "y": 1.5,
+ "w": 2
+ },
+ {
+ "label": "Insert",
+ "x": 15.25,
+ "y": 1.5
+ },
+ {
+ "label": "Home",
+ "x": 16.25,
+ "y": 1.5
+ },
+ {
+ "label": "PgUp",
+ "x": 17.25,
+ "y": 1.5
+ },
+ {
+ "label": "Tab",
+ "x": 0,
+ "y": 2.5,
+ "w": 1.5
+ },
+ {
+ "label": "Q",
+ "x": 1.5,
+ "y": 2.5
+ },
+ {
+ "label": "W",
+ "x": 2.5,
+ "y": 2.5
+ },
+ {
+ "label": "E",
+ "x": 3.5,
+ "y": 2.5
+ },
+ {
+ "label": "R",
+ "x": 4.5,
+ "y": 2.5
+ },
+ {
+ "label": "T",
+ "x": 5.5,
+ "y": 2.5
+ },
+ {
+ "label": "Y",
+ "x": 6.5,
+ "y": 2.5
+ },
+ {
+ "label": "U",
+ "x": 7.5,
+ "y": 2.5
+ },
+ {
+ "label": "I",
+ "x": 8.5,
+ "y": 2.5
+ },
+ {
+ "label": "O",
+ "x": 9.5,
+ "y": 2.5
+ },
+ {
+ "label": "P",
+ "x": 10.5,
+ "y": 2.5
+ },
+ {
+ "label": "{",
+ "x": 11.5,
+ "y": 2.5
+ },
+ {
+ "label": "}",
+ "x": 12.5,
+ "y": 2.5
+ },
+ {
+ "label": "|",
+ "x": 13.5,
+ "y": 2.5,
+ "w": 1.5
+ },
+ {
+ "label": "Delete",
+ "x": 15.25,
+ "y": 2.5
+ },
+ {
+ "label": "End",
+ "x": 16.25,
+ "y": 2.5
+ },
+ {
+ "label": "PgDn",
+ "x": 17.25,
+ "y": 2.5
+ },
+ {
+ "label": "Caps Lock",
+ "x": 0,
+ "y": 3.5,
+ "w": 1.75
+ },
+ {
+ "label": "A",
+ "x": 1.75,
+ "y": 3.5
+ },
+ {
+ "label": "S",
+ "x": 2.75,
+ "y": 3.5
+ },
+ {
+ "label": "D",
+ "x": 3.75,
+ "y": 3.5
+ },
+ {
+ "label": "F",
+ "x": 4.75,
+ "y": 3.5
+ },
+ {
+ "label": "G",
+ "x": 5.75,
+ "y": 3.5
+ },
+ {
+ "label": "H",
+ "x": 6.75,
+ "y": 3.5
+ },
+ {
+ "label": "J",
+ "x": 7.75,
+ "y": 3.5
+ },
+ {
+ "label": "K",
+ "x": 8.75,
+ "y": 3.5
+ },
+ {
+ "label": "L",
+ "x": 9.75,
+ "y": 3.5
+ },
+ {
+ "label": ":",
+ "x": 10.75,
+ "y": 3.5
+ },
+ {
+ "label": "\"",
+ "x": 11.75,
+ "y": 3.5
+ },
+ {
+ "label": "Enter",
+ "x": 12.75,
+ "y": 3.5,
+ "w": 2.25
+ },
+ {
+ "label": "Shift",
+ "x": 0,
+ "y": 4.5,
+ "w": 2.25
+ },
+ {
+ "label": "Z",
+ "x": 2.25,
+ "y": 4.5
+ },
+ {
+ "label": "X",
+ "x": 3.25,
+ "y": 4.5
+ },
+ {
+ "label": "C",
+ "x": 4.25,
+ "y": 4.5
+ },
+ {
+ "label": "V",
+ "x": 5.25,
+ "y": 4.5
+ },
+ {
+ "label": "B",
+ "x": 6.25,
+ "y": 4.5
+ },
+ {
+ "label": "N",
+ "x": 7.25,
+ "y": 4.5
+ },
+ {
+ "label": "M",
+ "x": 8.25,
+ "y": 4.5
+ },
+ {
+ "label": "<",
+ "x": 9.25,
+ "y": 4.5
+ },
+ {
+ "label": ">",
+ "x": 10.25,
+ "y": 4.5
+ },
+ {
+ "label": "?",
+ "x": 11.25,
+ "y": 4.5
+ },
+ {
+ "label": "Shift",
+ "x": 12.25,
+ "y": 4.5,
+ "w": 2.75
+ },
+ {
+ "label": "\u2191",
+ "x": 16.25,
+ "y": 4.5
+ },
+ {
+ "label": "Ctrl",
+ "x": 0,
+ "y": 5.5,
+ "w": 1.25
+ },
+ {
+ "label": "Win",
+ "x": 1.25,
+ "y": 5.5,
+ "w": 1.25
+ },
+ {
+ "label": "Alt",
+ "x": 2.5,
+ "y": 5.5,
+ "w": 1.25
+ },
+ {
+ "x": 3.75,
+ "y": 5.5,
+ "w": 6.25
+ },
+ {
+ "label": "Alt",
+ "x": 10,
+ "y": 5.5,
+ "w": 1.25
+ },
+ {
+ "label": "Win",
+ "x": 11.25,
+ "y": 5.5,
+ "w": 1.25
+ },
+ {
+ "label": "Menu",
+ "x": 12.5,
+ "y": 5.5,
+ "w": 1.25
+ },
+ {
+ "label": "Ctrl",
+ "x": 13.75,
+ "y": 5.5,
+ "w": 1.25
+ },
+ {
+ "label": "\u2190",
+ "x": 15.25,
+ "y": 5.5
+ },
+ {
+ "label": "\u2193",
+ "x": 16.25,
+ "y": 5.5
+ },
+ {
+ "label": "\u2192",
+ "x": 17.25,
+ "y": 5.5
+ }
+ ]
+ }
+ }
+}
diff --git a/keyboards/yandrstudio/eau87/keymaps/default/keymap.c b/keyboards/yandrstudio/eau87/keymaps/default/keymap.c
new file mode 100644
index 0000000000..ce5c77baa4
--- /dev/null
+++ b/keyboards/yandrstudio/eau87/keymaps/default/keymap.c
@@ -0,0 +1,27 @@
+/* Copyright 2022 JasonRen(biu)
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see .
+ */
+
+#include QMK_KEYBOARD_H
+
+const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
+ [0] = LAYOUT(
+ KC_ESC, KC_F1, KC_F2, KC_F3, KC_F4, KC_F5, KC_F6, KC_F7, KC_F8, KC_F9, KC_F10, KC_F11, KC_F12, KC_MUTE, KC_VOLU, KC_VOLD,
+ KC_GRV, KC_1, KC_2, KC_3, KC_4, KC_5, KC_6, KC_7, KC_8, KC_9, KC_0, KC_MINS, KC_EQL, KC_BSPC, KC_INS, KC_HOME, KC_PGUP,
+ KC_TAB, KC_Q, KC_W, KC_E, KC_R, KC_T, KC_Y, KC_U, KC_I, KC_O, KC_P, KC_LBRC, KC_RBRC, KC_BSLS, KC_DEL, KC_END, KC_PGDN,
+ KC_CAPS, KC_A, KC_S, KC_D, KC_F, KC_G, KC_H, KC_J, KC_K, KC_L, KC_SCLN, KC_QUOT, KC_ENT,
+ KC_LSFT, KC_Z, KC_X, KC_C, KC_V, KC_B, KC_N, KC_M, KC_COMM,KC_DOT, KC_SLSH, KC_RSFT, KC_UP,
+ KC_LCTL, KC_LGUI, KC_LALT, KC_SPC, KC_RALT, MO(1), KC_APP, KC_RCTL, KC_LEFT, KC_DOWN, KC_RIGHT)
+};
diff --git a/keyboards/yandrstudio/eau87/keymaps/via/keymap.c b/keyboards/yandrstudio/eau87/keymaps/via/keymap.c
new file mode 100644
index 0000000000..4f592bd664
--- /dev/null
+++ b/keyboards/yandrstudio/eau87/keymaps/via/keymap.c
@@ -0,0 +1,48 @@
+/* Copyright 2022 JasonRen(biu)
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see .
+ */
+
+#include QMK_KEYBOARD_H
+
+const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
+ [0] = LAYOUT(
+ KC_ESC, KC_F1, KC_F2, KC_F3, KC_F4, KC_F5, KC_F6, KC_F7, KC_F8, KC_F9, KC_F10, KC_F11, KC_F12, KC_MUTE, KC_VOLU, KC_VOLD,
+ KC_GRV, KC_1, KC_2, KC_3, KC_4, KC_5, KC_6, KC_7, KC_8, KC_9, KC_0, KC_MINS, KC_EQL, KC_BSPC, KC_INS, KC_HOME, KC_PGUP,
+ KC_TAB, KC_Q, KC_W, KC_E, KC_R, KC_T, KC_Y, KC_U, KC_I, KC_O, KC_P, KC_LBRC, KC_RBRC, KC_BSLS, KC_DEL, KC_END, KC_PGDN,
+ KC_CAPS, KC_A, KC_S, KC_D, KC_F, KC_G, KC_H, KC_J, KC_K, KC_L, KC_SCLN, KC_QUOT, KC_ENT,
+ KC_LSFT, KC_Z, KC_X, KC_C, KC_V, KC_B, KC_N, KC_M, KC_COMM,KC_DOT, KC_SLSH, KC_RSFT, KC_UP,
+ KC_LCTL, KC_LGUI, KC_LALT, KC_SPC, KC_RALT, MO(1), KC_APP, KC_RCTL, KC_LEFT, KC_DOWN, KC_RIGHT),
+ [1] = LAYOUT(
+ KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS,
+ KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS,
+ KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS,
+ KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS,
+ KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS,
+ KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS),
+ [2] = LAYOUT(
+ KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS,
+ KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS,
+ KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS,
+ KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS,
+ KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS,
+ KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS),
+ [3] = LAYOUT(
+ KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS,
+ KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS,
+ KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS,
+ KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS,
+ KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS,
+ KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS)
+};
diff --git a/keyboards/yandrstudio/eau87/keymaps/via/rules.mk b/keyboards/yandrstudio/eau87/keymaps/via/rules.mk
new file mode 100644
index 0000000000..1e5b99807c
--- /dev/null
+++ b/keyboards/yandrstudio/eau87/keymaps/via/rules.mk
@@ -0,0 +1 @@
+VIA_ENABLE = yes
diff --git a/keyboards/yandrstudio/eau87/mcuconf.h b/keyboards/yandrstudio/eau87/mcuconf.h
new file mode 100644
index 0000000000..bdfb4641ea
--- /dev/null
+++ b/keyboards/yandrstudio/eau87/mcuconf.h
@@ -0,0 +1,21 @@
+/* Copyright 2022 JasonRen(biu)
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see .
+ */
+#pragma once
+
+#include_next
+
+#undef STM32_PLLXTPRE
+#define STM32_PLLXTPRE STM32_PLLXTPRE_DIV2
diff --git a/keyboards/yandrstudio/eau87/readme.md b/keyboards/yandrstudio/eau87/readme.md
new file mode 100644
index 0000000000..da25363835
--- /dev/null
+++ b/keyboards/yandrstudio/eau87/readme.md
@@ -0,0 +1,22 @@
+# eau87
+
+
+A 80% keyboard.
+This keyboard use 16mhz HSE and APM32F103 as MCU.
+
+- Keyboard Maintainer: https://github.com/jiaxin96
+- Hardware Supported: eau87
+- Hardware Availability: [CHAOSERA SELL](https://www.chaosera-sell.com)
+
+Make example for this keyboard (after setting up your build environment):
+
+ make yandrstudio/eau87:default
+
+See [build environment setup](https://docs.qmk.fm/#/getting_started_build_tools) then the [make instructions](https://docs.qmk.fm/#/getting_started_make_guide) for more information.
+
+## Bootloader
+
+Enter the bootloader in 2 ways:
+
+- **Bootmagic reset**: Hold down the key at (0,0) in the matrix (usually the top left key which is Escape in this keyboard) and plug in the keyboard
+- **Keycode in layout**: Press the key mapped to `QK_BOOT` if it is available.
diff --git a/keyboards/yandrstudio/eau87/rules.mk b/keyboards/yandrstudio/eau87/rules.mk
new file mode 100644
index 0000000000..4a92d0f891
--- /dev/null
+++ b/keyboards/yandrstudio/eau87/rules.mk
@@ -0,0 +1,15 @@
+# Wildcard to allow APM32 MCU
+DFU_SUFFIX_ARGS = -p FFFF -v FFFF
+
+# Build Options
+# change yes to no to disable
+#
+BOOTMAGIC_ENABLE = yes # Enable Bootmagic Lite
+MOUSEKEY_ENABLE = yes # Mouse keys
+EXTRAKEY_ENABLE = yes # Audio control and System control
+CONSOLE_ENABLE = no # Console for debug
+COMMAND_ENABLE = no # Commands for debug and configuration
+NKRO_ENABLE = yes # Enable N-Key Rollover
+BACKLIGHT_ENABLE = no # Enable keyboard backlight functionality
+RGBLIGHT_ENABLE = no # Enable keyboard RGB underglow
+AUDIO_ENABLE = no # Audio output