They have a pretty long history of publicly claiming to be best buddies but not-so-secretly despising each other and eyeing each other’s territory.
IIRC it was also commonly thought the Soviet Union and PRC were buddies because Communism but they each claimed to be the true successor to Marx’s ideology and denounced the other as inadequate.
Might be misremembering some parts, it’s been a while since I studied this.
It’s like the people who used to put messages about preventing Facebook from using their content in their profile descriptions. It probably won’t actually do anything, but it’s a nice thought and more power to them if it makes them feel better.