what is the first step i need to do for traveling?

My boss open a new business in bahrain. and he want me to go to china to check and purchase some items in wenzhou to bring in bahrain. I am planning to go to china next month., 1st week of sept. but i am coming from Philippines to china and from china to bahrain. as planned i am going to stay for a maximum of 5 days only.
please advice.

many thanks,
mariam