Your case is exactly the same as mine.

Our attitude towards the other party is that according to the provisions of the trademark law, you cannot use the trademark procedure to fight against me. The only option is litigation.

Our counterparty is a world-renowned company, and my customers are also good in China.

In short, the current situation is that neither party is fully sure. My suggestion is to passively accept all the actions of the other party and register an alternative trademark in secret.