diff --git a/oci/create_instance.sh b/oci/create_instance.sh
index ddd6c2d..b8e0462 100644
--- a/oci/create_instance.sh
+++ b/oci/create_instance.sh
@@ -361,9 +361,18 @@ main() {
         local fifo
         fifo=$(mktemp -u)
         mkfifo "$fifo"
-        trap "rm -f \"$fifo\"" EXIT
+
+        # 启动后台任务
         configure_network "$ocid" "$fifo" &
+        local bg_pid=$!
+
+        # 读取结果
         read subnet_id < "$fifo"
+
+        # 等待后台任务完成并清理
+        wait "$bg_pid"
+        rm -f "$fifo"
+
         log_success "网络配置完成 (子网ID: $subnet_id)"
     else
         log_info "使用指定的子网ID: $subnet_id"