Answer:
Cautious
Step-by-step explanation:
The word that best describes the attitude the Chinese and Japanese had to Europeans involvement in their lives is CAUTIOUS.
This is evident in the fact that generally, both China and Japan hold the belief and perception that Europeans involvement in their lives would mean domination of the Europeans on them, and also, this would lead to interference upon their ability to dominate their region in terms of socio-political and economic manner.
Hence, they were CAUTIOUS in their approach.