Doing research on the market is important in China, but personal relationships are equally essential to business success here. Chinese business relationship inevitably becomes a social relationship.
Chinese business contacts are mostly referrals; essentially a business relationship is struck based on another business associate recommendation. The best prices and deals often come from a strong recommendation.
However, it is common today for cold calls and direct contacts, given the availability of the internet and the competitive nature of Chinese businesses. You may source from the internet, trade fairs, catalogues and brochures, advertisements and approach the Chinese companies directly through a call or email.