Is it possible to obtain a Chinese multiple-entry visa for business purposes after the first visit?

As we are establishing business relations and placing orders with Chinese suppliers we will need to travel more than twice in 6 months after our first visit to China. Should we apply for a single-entry 3 month type (or a double-entry 6 month type), then apply for a multiple entry 6-month one when we return so we can travel freely to maintain business relations?