Recover many Bitcoin wallets purchased in 2012.找回2012年购买的很多比特币钱包

I bought a lot of Bitcoin in 2012, and it was stored in a Chinese wallet app. The exported private key is not in a standard format—it's a 45-character string, likely custom-encrypted. I don't remember whether there was a password required when exporting from the wallet. I'm looking for old wallets from 2012 to 2018, specifically Chinese wallet apps. A reward is offered for any clues about the app.

2012年购买的很多比特币，然后是中国的一款钱包app，导出的私钥不是标准格式的，是那种45个字符串，应该是自定义加密的，钱包导出是否有密码不记得了，找一下2012年到2018年的老钱包，中国的钱包app，能提供app线索有报酬。 不记得地址了，只有45个字符串，开头是数字5