Party-speak refers to speech typical of the political party, in this case the Chinese Communist Party. The sense is of a language full of rigid and ritualistic formulations and the apologies were just a formality. 

[The Arithmetic of Party-Speak][1]:

> - The 19th National Congress of the Chinese Communist Party is just around the corner — and that means the machine of political discourse is humming away at high speed.

Here ***[speak][2]*** is used as a suffix meaning: 

> (informal mainly disapproving) used to form nouns to mean the special language used in a particular subject area or business:

> - computer-speak
> - marketing-speak

(Cambridge Dictionary)
  [1]: https://medium.com/@cmphku/the-arithmetic-of-party-speak-c52debdd41db
  [2]: https://dictionary.cambridge.org/dictionary/english/speak