WHAT DOES IT ACTUALLY MEAN IF THE CITY OF LONDON IS THE BANKER OF THE RENMINBI?

How much power will the UK have over China?

Truss' speech at the Mansion House last night was very anti-Russia and very anti-China.

Why is China allowing the City of London to become the banker of the Renminbi? 

Is China falling into a British trap?

For example, if China decides to invade Taiwan how can the UK use its power over the Renminbi to punish China, should it wish to do so?