Is there a contradiction between monopoly and patent?

The first answer to your question is yes or no contradiction. Your question depends on your understanding of the patent. First of all, you can only have the exclusive right to a patented product if you apply for a patent and get a certificate. Pricing is managed by the price bureau, which means the price cannot be outrageous. Otherwise, the supply of,, and must be up to everyone, and there is nothing you can do if your products can't be sold. However, although you have obtained a patent on a product, it does not mean that there is no room for improvement in your patented technology. If someone else develops another technology on the basis of your patent, it is several times higher than the patented technology you applied for. In other words, there is no end to technological development, and it depends on whether you can develop it. It takes a long time to develop it. Intellectual property rights protect vicious competition, there is no monopoly condition at all, and it has nothing to do with monopoly. No matter how big the brand is, it is also reflected by people's ability. Big brands will be out as long as they have the ability. Jiaduobao is an example. No matter how good the patent is, there is room for improvement. As long as it is improved, others can also apply and get a certificate.