New Zealand is one of the 5 eyes so it is expected that it would ally with the US. China should try to maintain a friendly relationship with New Zealand as long as possible but eventually things would deteriorate. As for Philippines, China doesn't trust Philippines to begin with. Even during Durtete administration, no major investment has materialized. In comparison, at that same period Indonesia, Cambodia, and even Vietnam have received major investment from China. So it can be said that China doesn't think Philippines can be won over.
As for South Korea, South Korean public opinion of China has been declined ever since early 00s. A rise in South Korean nationalism and economy has emboldened it to seek territory ambition by distorting facts and history. South Korean government has been pragmatic to the extent that it tried not to antagonize China too much but at the same time encouraged negative perception towards China among public. Most of the older South Koreans that I know of are much more pragmatic but younger generation has seemed to lose that quality. South Korean youngsters are actually more active than Japanese youngster in voicing support of Hong Kong rioters. I think too much brainwashing has distorted critical thinking skills of youngsters.