增加 reverse 功能

[https://app.yinxiang.com/shard/s4/sh/936faf16-cccd-4776-8b8f-a89b430da1a5/418a7a73013f7eb142f857d09b54c78a](https://app.yinxiang.com/shard/s4/sh/936faf16-cccd-4776-8b8f-a89b430da1a5/418a7a73013f7eb142f857d09b54c78a)