The Chinese ship actively blocking a rescue operation until they fully understood the potential blowback.
That’s your bad faith interpretation based on what one party is saying about the incident. (Especially the “potential blowback”).
Whereas Singaporean state media states more neutrally:
The Chinese ships ceased these actions and offered to help after being informed about the “humanitarian mission”, it [Philippine Coast Guard] added.
Which is reasonable, because China was operating on previous experiences. The Chinese adapted once they got more information about the situation (which they were under no obligation to and wouldn’t do if they wouldn’t have taken the Philippine Coast Guard in good faith). What did you want them to do? nOt bE tHeRE iN tHe FirsTplAce", amirite?