2. In order to be consistent with the internationally adopted term
3. The term is longer, so that businesses can recover their investment in more time; Shorter is beneficial for the public to get the existing technology earlier. Weighing the two aspects, I decided to have a deadline, but it should not be too long or too short.
4. If you find that your own patent or trademark is worthless, you can stop this right automatically without paying the fee before it expires. So the deadline is just an upper limit.
5. The duration of protection varies from country to country. The duration of protection in China has been discussed and practiced in China, which can meet everyone's needs at this stage. In the future, with the development of society, it will not meet the needs and will change.