How to manufacture a cable ?

While Thorman makes a good point, I am curious as to whether you are actually talking about the marketing aspect, or the manufacturing process in terms of constructing the cables in preparation for marketing.

If the latter, then the answer really depends on whether you have the time and money to do this yourself or if you will need to subcontract.

Either way a good test is to have a few pair made up and ask some audiophiles to beta test them for you. I have done this on occasion with both cables and equipment. The opinions you receive could be very valuable in helping you sort all of this out.

I am talking more about the manufacturing process.
If I decide to subcontract, where do I find a good one ?

I already got good reviews from other audiogoners about the cable, so I would like to bring manufacture it.

Is there a good Chinese cable company I could contact, to bring down the cost ?

It depends upon how many you are ordering at a time.

Go to a large public library. They have business directories. (which are also on-line, but you may need the librarians assistance)
Manufacturing directories have every sort of business imaginable. what they make, what the can make.. From all over. Each state has one (some have two).
Other countries do too. I woud also reccomend the library for business start-up guidance.
Good luck. Don't invest too much, know how to keep the business out of your personal money!!!!

Be very knowledgeable about intellectual property laws, or lack thereof, in countries where you might be considering manufacturers for your cables.

Just out of curiosity what type of initial run are you looking at. If it's a small t5o moderate amount I might know someone who can help you.