Could be fishing for the increasing(?) number of permanent residency holders, who need no work permit?

There seems to be a growing trend to hire English speaking teachers for subjects other than those restricted. Art, sports, etc...

Reasons may be questionable, but optimistically such approach may address some of the points @bubblyian mentioned above - incorporating casual English communication into the primary subject, which itself isn't a core test subject either.

In the evident case that you are unable to come to China to do it yourself, what you may ATTEMPT is to write a document called "power of attorney" that authorizes a named person to act on your behalf to visit the notary office in Kunming and get things moving there.

I expect that not all entities in China recognize such method, but for example during company registrations in China it is a known procedure for local operators (lawyers etc) to handle matters of their clients like this - the term (at least Chinese version) is understood.

That of course assumes that you have a contact you trust here.

Furthermore, for the said document to have any use in China, you would have to go through the multi-step procedure to get it legalized in Germany - from your local notary office to the German foreign ministry (or equivalent) and finally the/a Chinese consulate in Germany. Stamped/signed in every place.

It may be ideal to write the original document in both English and Chinese.

When the HSR line to Dali opened, my wife had bought tickets on it to Dali, and because it was our first time on it, we of course unknowingly went all the way south to the High Speed Train station to board it.

To our surprise we had to then pay for separate tickets from the South station back north to Kunming station at the end of Beijing Road.

1. Bank of China.
2. Don't need that, so haven't tried. Only EUR from EU.