I did the math and the number of hunters in the 4 states listed would total 2,300,000 armed citizens.
The number of US active duty military is 1,439,995 soldiers. Including the Reserves it would be 2,291,000 troops.
Active troops from China total 2,285,000; but if you add in their reserves, it balloons up to 4,585,000 troops.
So, the email is correct if we are only counting active duty soldiers; but there are still 46 US states to count, so the overall point of the email is valid.