The Chinese leader's message in San Francisco got the attention of U.S. officials because it was delivered at a meeting that was intended to reduce tensions.
Someone said after Russia's military was shown to be a farce, that if they were China they'd be shitting their pants and immediately launch an investigation into how good their military actually is.
It would take around 400 million bodies to fill in a one metre wide corridor across the strait based on some napkin math. So yeah I guess it's actually possible technically
China's big problem is what they offer internationally is cheap labor and they're going through a population collapse now, like other countries that ascend economically, people have fewer kids and younger workers want better salaries and conditions, (understandably so!) This combined with the US's trade war with them has caused international companies to move a lot of production to other impoverished nations like Bangladesh, Vietnam, and Mexico, among others instead of to China. China's economic miracle was because of this large pool of population that is vanishing. Sacrificing soldiers of reproductive age would accelerate this problem.