How to operate and sell the technology that has not been patented?

Technology that has not been patented can only be protected by trade secrets. If it needs to be transferred, and it can't control its own technical secrets like Coca-Cola, it can only rely on the contract to restrain the other party's communication behavior, but the domestic binding force is relatively weak at present.

Self-realization is the best way. If it is limited to funds, you can find a collaborator or, or you can cooperate without disclosing the technology.

Applying for a patent means that the technology is open, and you can decide whether to protect your technology by patent protection or trade secrets according to whether the technology is easy to be imitated.