Firstly, if you have every been to China and lived there for a while, you should notice that they don't use email quite often(only 38.1%). If the card inside the wallet includes a wechat QR code, that will be adifferent thing. Secondly, the wallet didn't look like a wallet that people would use everyday. They could be easily cleaned away by Chinese road cleaners. Thirdly, although everybody in China learns English, it doesn't mean everyone can use it well. If you speak English to tell someone that you found a wallet, you'd better find a translator or simply go with Maindrain. The experiment wasn't quite scientific, in my opinion.