第五十条 办理退（免）税的出口业务发生销售折让、中止或者退回等情形的，纳税人应当缴回已退（免）税款。
// it is ok to write more data，更多细节参见WPS官方版本下载
if (n <= 1) return;，详情可参考雷电模拟器官方版本下载
// Even if the readable side's buffer is full, this succeeds
"If you are worried about paying for your electricity or gas, help is available."