diff --git a/src/kcpServer/packets/BuyResin.ts b/src/kcpServer/packets/BuyResin.ts
new file mode 100644
index 0000000..e304ceb
--- /dev/null
+++ b/src/kcpServer/packets/BuyResin.ts
@@ -0,0 +1,49 @@
+import Packet, { PacketInterface, PacketContext } from '#/packet'
+import { RetcodeEnum } from '@/types/proto/enum'
+import ResinChange from './ResinChange'
+
+export interface BuyResinReq { }
+
+export interface BuyResinRsp {
+  retcode: RetcodeEnum
+  curValue?: number
+}
+
+class BuyResinPacket extends Packet implements PacketInterface {
+  constructor() {
+    super('BuyResin')
+  }
+
+  async request(context: PacketContext, data: BuyResinReq): Promise<void> {
+    const { player } = context
+    let curValue = player.resin
+
+    // always first time
+    // Cost primogem [50, 100, 100, 150, 200, 200]
+    // Limit 6 times (official server)
+    if (player.primogem >= 50) {
+      player.addPrimogem(-50)
+      player.addResin(60)
+
+      await ResinChange.sendNotify(context)
+      await this.response(context, {
+        retcode: RetcodeEnum.RET_SUCC,
+        curValue: player.resin + 60
+      })
+    } else {
+      await this.response(context, {
+        retcode: RetcodeEnum.RET_RESIN_GAIN_FAILED,
+        curValue: player.resin
+      })
+    }
+
+    
+  }
+
+  async response(context: PacketContext, data: BuyResinRsp): Promise<void> {
+    await super.response(context, data)
+  }
+}
+
+let packet: BuyResinPacket
+export default (() => packet = packet || new BuyResinPacket())()
\ No newline at end of file
diff --git a/src/kcpServer/packets/ResinChange.ts b/src/kcpServer/packets/ResinChange.ts
new file mode 100644
index 0000000..3f98dec
--- /dev/null
+++ b/src/kcpServer/packets/ResinChange.ts
@@ -0,0 +1,28 @@
+import Packet, { PacketInterface, PacketContext } from '#/packet'
+
+export interface ResinChangeNotify {
+  nextAddTimestamp: number
+  curBuyCount: number
+  curValue: number
+}
+
+class ResinChangePacket extends Packet implements PacketInterface {
+  constructor() {
+    super('ResinChange')
+  }
+
+  async sendNotify(context: PacketContext): Promise<void> {
+    const { player } = context
+
+    const notifyData: ResinChangeNotify = {
+      nextAddTimestamp: Date.now(),
+      curBuyCount: 0,
+      curValue: player.resin + 60
+    }
+
+    await super.sendNotify(context, notifyData)
+  }
+}
+
+let packet: ResinChangePacket
+export default (() => packet = packet || new ResinChangePacket())()
\ No newline at end of file