The United States has indicated that they would intervene, which means the only way to have a chance at a successful amphibious landing would be to conduct preemptive strikes against US bases in the region. To do so would be a direct declaration of war against the US and NATO, which, at current, China cannot hope to win.
I think China is out of there mind here. They either are A. willing to smash Taiwan to rubble and call it a victory or B. completely overestimate their chance of success.
I think China's real hope is that they can threaten their way to an advantageous position and take Taiwan without firing a bullet, but so far no one is blinking and the west is fed up with autocrats threatening warfare to get their way.