For Chinese over 30, the sex ratio is the normal 105 males per 100 females. For Chinese under 30, the ratio varies but is between 110 and 116 males per 100 females for various cohorts.
https://www.statista.com/statistics/282119/china-sex-ratio-by-age-group/
The sex ratio is probably less of a problem in China than it is in Islamic countries where males marry multiple females.