100% this.

Don’t just ignore it because they can sue and if you ignore that then you’ll get a default judgment against you which you actually will have to pay even if the original claim was complete bullshit.

On the other hand, if you demand they provide actual proof of the debt they will usually not have it and will just go away.

Not to mention the CCTV Spring Festival Gala (https://en.m.wikipedia.org/wiki/CMG_New_Year's_Gala).

This isn’t even remotely close to the biggest.