First of all, it does not have to be based on money. Treating someone with decency while others treat him/her unfairly could result in a good relationship. Second, it starts with and builds on the trustworthiness of the individual or the company. If a company promised certain things and delivered as promised, the company is showing trustworthiness and the Chinese would be more inclined to deal with them again. Third, being dependable and reliable definitely strengthens the relationship. It is like being friends, and friends can count on each other in good and tough times. A good example is related to the 1989 political instability in China. Companies that stayed found their relationship with the Chinese strengthened as they were viewed by the Chinese as friends who did not abandon the Chinese when they needed friends. Fourth, frequent contacts with each other foster understanding and emotional bonds and the Chinese often feel obligated to do business with their friends first.
"Guanxi" or relationship with high rank officials are still important for doing business in China, though declining to some extent. Political and administrative interference in business have declined. More and more companies have found themselves on their own surviving without government subsidiaries. If they are not getting any help from the government they are more reluctant to be influenced by government officials. So government "Guanxi" may have less influence with these companies.
Since "Guanxi" and relationship could function as an information network, companies with wide "Guanxi" and relationship networks often have much higher performance than companies with little or no relationship with the Chinese.
Final Words on "Guanxi"
Keep in mind that "Guanxi" can take on many forms. It does not have to be based on money. It is completely legal in their culture and not regarded as bribery in any way. So, there is no need to feel uncomfortable about it. Trustworthiness of both the company and individual is an important component. Following through on promises is a good indication of this. Treating someone with courtesy while others treat him or her unfairly is another aspect. Frequent contact fosters friendship as well. Chinese feel obligated to do business with their friends first. There are risks with this system, as well. When something goes wrong, the relationships are challenged, and friendships quickly disappear. "Guanxi" can also be very one-sided. When "Guanxi" is involved, there is a risk of obtaining an invoice of twice the amount that you bargained for.
How relationship is established