Probably because of the tiny dong that Indian men are known for. Your women literally go on vacations in other countries to get away from the lowest average penis size.
Indian men love to have sex with Chinese women. There is a strong lust. Also, there are many Chinese Massage parlors in India where Indian men have sex with prostitutied China women.... But also, many Chinese women and Indian men get married. Almost all Chinese-Indian couples are between Chinese women and Indian men!