Why do you think that? Over the last couple decades China absorbed a few neighboring regions (namely Hong Kong and Tibet) and made a bunch of investments in small countries. Meanwhile we (the US) destroyed Afghanistan for no real reason, blew Iraq up for fun, forestalled all the real climate negotiations, polluted space with tiny satellites, nearly caused ourselves a civil war, and unleashed AI for the lolz. What had China done that could be seen as equally destabilizing?