梯子不能用了，之前自动切换梯子的bash脚本也丢了，用Py重写写了一个。实在懒得自己架梯子，不如直接买了几十条线路的机场，然后负载均衡自动切换最低的线路。
@yourFault 搬瓦工的CN2、GIA还挺稳的～
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