What is the Best way to get Forex - USD ($) and RMB - cheap to pay your Chinese Manufacturers/Company?

What payment system is the best and Safest, especially for a new importer?

What Documents do I need to Have down when bringing in these Dump Trucks and Tractors?

How feasible and easy is it to travel down there? cos i would have to

What would be the cost of travel, visa, ticket, hotel, transportation, feeding and miscellaneous for like 3 weeks?

Customs and Ports wahala, what do you advise i get or do down before my goods arrive?