It is more difficult. Nowadays, optical fiber fusion is very common and the competition is fierce. Buying a domestic machine can only be a small fight. Telecom-level jobs require imported machines to meet technical indicators. In this line of work, one must have a platform to take over the work, and the other is excellent technology, otherwise it will be difficult to develop. You can find a network company to familiarize yourself with the welding work, accumulate some customer resources, and get in touch with several larger network and monitoring companies, and then you can package their welding work and do it yourself. I hope I can help you. Let's talk about cold welding. Cold welding is only a temporary way to repair the project, and a short time is ok. Cold welding is unstable and welding is the mainstream at present.