Yes it is normal PRC practice. It has escalated. Poke the bear and you will get a response.so is that just normal of china?
"For example, the Prime Minister on October 4 2018, a month after assuming office, told an Australian-Chinese community lunch:
Our government is strongly committed to working closely with China’s leaders to advance our Comprehensive Strategic Partnership. This is very important to us, because it’s the unique partnership that provides an invaluable framework for progressing our mutual and complementary interests"
Our Pm started the escalation with his push for an investigation into the origins of covid. The PRC are pushing back.
What did he expect.