China doesn't need to invade Taiwan, as the years go pass China will become more stronger and Taiwan people will have no choice but to bring in a pro Chinese government. Taiwan will be like Hong-Kong.
At the moment China is a seller but slowly the tables are being turned, Asia, Middleeast, ASEAN, Africa will become customers, and China will have a large local market aswell.
They just need to create a sanction proof trading currency, market for the weaker nations to bypass west, on top offer security. From the Russian/Ukraine war I assume the plans are already in place, otherwise Russia will be isolated and that is not how China wants to go in to the 21st century.