Trust and personal connections are at the core of business in China. The Chinese believe strongly in building relationships first and then engaging in business. It is built on long-term partnership.
But you should know guangxi is a rental, not a purchase. It is a series of favors, and you have to give to get. Sometimes you do not always control how you will pay back a guanxi debt. It can't transfer. When your guanxi person goes, so does the relationship.