Chinese sealift can land a div per day and that's not counting the need for munition replacements. There's 3 corps REGFORCE waiting for them. So, you need to balance munitions, food, and water, as well as the next invasion wave. Standard doctrine says you need 3 to 1 attacker/defender ratio at the point of contact. There's no way in hell the Chinese can mass those kind of numbers against prepared defences that took decades to build.