Is it legal to buy a parts assembly loader?

It is legal to buy parts and assemble loaders. It is not illegal to use it yourself, but it is illegal to sell it. Buy a machine, assemble it yourself, and then use it yourself. If it is simply used, not for commercial purposes, it is not an infringement or an offence. If you use it for commercial sales, it is an infringement and a crime. According to Article 1 1 of the Patent Law, after the patent right for invention and utility model is granted, no unit or individual may exploit its patent without the permission of the patentee, that is, it may not manufacture, use, promise to sell, sell or import its patented product for production and business purposes, nor may it use its patented method and use, promise to sell, sell or import the product directly obtained according to the patented method.