, east, central, southwest, northwest six sales & service network, more than 20 distribution partners.?Production ability and Sales Number 1 in Asia.products are exported to Canada, Australia, Japan, South Korea, the United States, Latin America, South Africa, Southeast Asia, Saudi Arabia etc.Optfan has developed to be a High technology corporation &? professional extra large cooling systems integrator.?FAQ?1.What is your minimum order quantity, can you send me samples?Our minimum quantity i