how do i get China to travel to do business like buying laptops and laptops parts

Jonathan, if you have a supplier in PRC, you can apply for a business M type to enter PRC and buy goods. The first thing is to prepare the required materials containing your passport and copy of its data page, the completed application form attached with a passport-style photo, and an invitation letter from your supplier. Next, hand in the application to the embassy of PRC to apply for it.

If you don’t have a supplier, you can apply for a tourist L type to go there. The required documents include your passport and copy of its data page, the completed application form attached with a passport-style photo, hotel reservation and round trip air tickets.

Of course, the consular officers may require you to provide other supplementary documents according to your situation.