Does it matter if you pay a fine to the police through WeChat, Zhihu?

It doesn't matter. The money in WeChat is also recognized by the state and protected by law. It has the same legal effect as cash and belongs to citizens' legitimate private property. As long as you pay the fine, you can use WeChat to pay the fine within the scope of supporting WeChat payment, and you can also pay a variety of goods and services. It is a normal channel to pay a fine with WeChat, and it has no effect to pay a fine with the police.