wonder if this is how China expects to invade Taiwan.

The sea state in the Taiwan Strait is often pretty rough. If WIG vehicles have any military value it's likely to be on inland waters where weather conditions are typically more benign.

The hisutton.com website is full of the recent Chinese naval developments, including huge floating landing piers and various novel submarines and ships. The pace and scale of investment is such that it seems they are building the capacity to genuinely do an opposed invasion