Country specific style.

[ZFT]

China:

Depending on where you stand, they can be seen as masters at maximising, or exploiting - the rules to their advantage. In a word: gamesmanship

1. Boosting
2. Delay of game / toilet breaks at strategic moments
3. Borderline legal serves

That said, I do appreciate their on-court temperament and behaviour during formal interviews which I feel is clearly the result of strict training and threat of punishment.