CNN - Nov 3 - Each weekend, mothers, fathers and other family members come to Shanghai's People's Park to find Mr or Miss Right for their children. The city even organizes an "annual love and marriage expo" that attracts 18K people. The market has been around since 2004, says Li, who runs a professional matchmaking service from the park. Men can register for free, while she charges $500 for women. Men born after 1970 can sign up, but women must be under 33. There are now 34M more men than women in China. Chinese men tend to "marry down" both in terms of age and educational level.