This is easy. First of all, patents are protected in exchange for disclosure. The hard-invested R&D expenses and products produced will lead to the disclosure of the technology if applied for a patent. Moreover, once the patent is not authorized due to non-technical issues, , or the patent is poorly drafted and the scope of protection is relatively narrow, which is equivalent to making the technology public. Secondly, even if you apply for a patent, others can conduct further research and development based on your patent. If the technology is particularly advanced, it can become a stepping stone and learning product for others. Third, for pharmaceutical technology, competitors generally cannot obtain the technology through their products, and putting it on the market will not cause leakage of the technology. Therefore, if the technical secrets can be guaranteed, it may be appropriate to not apply for a patent, delay the application, or apply selectively. . Finally, the exception to patent protection in the pharmaceutical field is the bolar exception. Others can conduct research and development and apply for drug approval while the patent is valid, which indirectly speeds up the launch of competitors' drugs.