"The Chinese are infatuated with lucky numbers and this love extends to their businesses. The belief in good and bad luck can play a big role in whether a business is prepared to take chances; thus, any person looking to buy or sell domain names in the Chinese market needs to understand how numbers in Chinese culture affects the value of numeric domains."
A look into Chinese psychology and how numbers appeal to them may be found in this excellent article on eNaming
A look into Chinese psychology and how numbers appeal to them may be found in this excellent article on eNaming