diff --git a/.gitignore b/.gitignore
index 31d2550..9b070cd 100644
--- a/.gitignore
+++ b/.gitignore
@@ -23,4 +23,6 @@ run
 runs
 run-data
 
-repo
\ No newline at end of file
+repo
+
+othermods
\ No newline at end of file
diff --git a/src/main/java/com/extendedae_plus/network/UploadInventoryPatternToProviderC2SPacket.java b/src/main/java/com/extendedae_plus/network/UploadInventoryPatternToProviderC2SPacket.java
new file mode 100644
index 0000000..3f2b9b1
--- /dev/null
+++ b/src/main/java/com/extendedae_plus/network/UploadInventoryPatternToProviderC2SPacket.java
@@ -0,0 +1,46 @@
+package com.extendedae_plus.network;
+
+import com.extendedae_plus.util.ExtendedAEPatternUploadUtil;
+import net.minecraft.network.FriendlyByteBuf;
+import net.minecraft.network.codec.StreamCodec;
+import net.minecraft.network.protocol.common.custom.CustomPacketPayload;
+import net.minecraft.resources.ResourceLocation;
+import net.minecraft.server.level.ServerPlayer;
+import net.neoforged.neoforge.network.handling.IPayloadContext;
+
+/**
+ * C2S: 从样板访问终端上传玩家背包中的编码样板到指定的样板供应器。
+ * 适用于 ExtendedAE 的 GuiExPatternTerminal 或 AE2 的 PatternAccessTermScreen。
+ */
+public class UploadInventoryPatternToProviderC2SPacket implements CustomPacketPayload {
+    public static final Type<UploadInventoryPatternToProviderC2SPacket> TYPE = new Type<>(
+            ResourceLocation.fromNamespaceAndPath(com.extendedae_plus.ExtendedAEPlus.MODID, "upload_inventory_pattern_to_provider"));
+
+    public static final StreamCodec<FriendlyByteBuf, UploadInventoryPatternToProviderC2SPacket> STREAM_CODEC = StreamCodec.of(
+            (buf, pkt) -> {
+                buf.writeVarInt(pkt.playerSlotIndex);
+                buf.writeLong(pkt.providerId);
+            },
+            buf -> new UploadInventoryPatternToProviderC2SPacket(buf.readVarInt(), buf.readLong())
+    );
+
+    private final int playerSlotIndex;
+    private final long providerId;
+
+    public UploadInventoryPatternToProviderC2SPacket(int playerSlotIndex, long providerId) {
+        this.playerSlotIndex = playerSlotIndex;
+        this.providerId = providerId;
+    }
+
+    @Override
+    public Type<? extends CustomPacketPayload> type() {
+        return TYPE;
+    }
+
+    public static void handle(final UploadInventoryPatternToProviderC2SPacket msg, final IPayloadContext ctx) {
+        ctx.enqueueWork(() -> {
+            if (!(ctx.player() instanceof ServerPlayer player)) return;
+            ExtendedAEPatternUploadUtil.uploadPatternToProvider(player, msg.playerSlotIndex, msg.providerId);
+        });
+    }
+}