The downtown traffic in Yiwu is very convenient. You can take taxi or take bus to the place you want, either the factory or the commodity market. The flag down fare in Yiwu is 8 Yuan(including 3 yuan Bunker Adjustment Factor). If you are a carpool, you can get a more inexpensive price. For your reference, it will take you about 40 yuan from Yiwu new-built train station to Commodity Market by taxi, but if you share a taxi with others, it will be 10-20 yuan cheaper.
The other way to take a travel in Yiwu is by bus. Yiwu bus can take you everywhere you would like to, such as the commodity market, hotel, trading company or factory you want to visit. Below is part of Yiwu Traffic e for your reference.