China Product Sourcing and Assembly

I'm trying to ramp up my business and I need someone in China that speaks good English and Chinese to help me ship, source and assemble products in China. JOB FUNCTION: I regularly find products that I need to procure but I have to deal with multiple manufactures and factories. I want to be able to order my products and have them shipped to you in China, then have all the products packaged together and ship them to me. I may also need help in contacting some vendors because of language barriers and place orders. I always use paypal to make all my purchases. Some vendors will not accept paypal. In these cases I would be willing to pay you through paypal and you do the transaction with the company and charge me a markup or money for your time. I will be buying some parts from multiple factories and need the parts assembled or put together, usually by screws. It's not complicated just time consuming. I have one part that needs wires soldered to a connector. It would be great if you could have this assembled for me. Let me know how many of these job function you can handle and your idea on cost? I'm basically looking for a go to person in China that can make all this happen. I plan on doing long term business with you as I start to manufacture my product. We can work out the pricing, this project criteria is not in stone. I'm flexible.