They're also attempting to take control of the local operations of foreign companies in China:
"American and European companies involved in joint ventures with state-owned Chinese firms have been asked in recent months to give internal Communist Party cells an explicit role in decision-making"
"Late last month, executives from more than a dozen top European companies in China met in Beijing to discuss their concerns about the growing role of the ruling Communist Party in the local operations of foreign firms"
Only joint ventures, and the Chinese partner has to have the majority. Otherwise you are not going to do business there.
So it may be very well in scope of established rules.