Wondering mixed couples

Only a question we had yesterday with a couple living here; we were unable to figure out. When you hang out in major cities like Beijing, Shanghai … you can see some mixed couples but all of them are white man and a Chinese lady. Opposite white female dating a Chinese man is not reaching more than 1 to 5% of the mixed couples you can see. Just wondering how come ? Is that Asian men are not interested in dating other ethnicities ?