That video lies about how many women are actually in the Chinese women's army. The figure it quotes is closer to the amount of people fit for military service, it's not as if they actually have a professional active women's army of close to 300 milllion. But it does make a point about the sheer number of Chinese people that could in theory be part of an army.
However, if we did see a conflict between the states and china (highly unlikely, but still,) my money would be on the U.S. for the sheer amount they spend on military tech means they have a far superiorly equipped armed forces with vast amounts of experience and know how and would be able to call on support from more countries than China. Fortunately, for all it's faults as you say, M.A.D keeps us all safe despite also having the slight worry of also being able to destroy us all.
However, if we did see a conflict between the states and china (highly unlikely, but still,) my money would be on the U.S. for the sheer amount they spend on military tech means they have a far superiorly equipped armed forces with vast amounts of experience and know how and would be able to call on support from more countries than China. Fortunately, for all it's faults as you say, M.A.D keeps us all safe despite also having the slight worry of also being able to destroy us all.