Literally a few minutes ago, the pakistani parliament deposed Imran Khan as prime minister of Pakistan. This comes after the Supreme Court, under pressure from the US and the pakistani military (which has a long history of supporting US coups), repealed the convocation of elections by the president and ignored the blatant evidence of US interference in this vote of no confidence (politicians from Khans party were bribed to vote against him, also the US literally sent Khan a letter threatening a vote of no confidence if he didnt sanction Russia). The US just did a coup at Chinas doorstep. This isnt good.
Also, they have hindsight from the USSR. The US only has a few tried and true strategies at the end of the day, which China has seen used in full force during the Cold War. This allows them to anticipate what the US might do to them and preemptively develop a defence plan.