After patent a is authorized, your protection scope is a.
Others will make changes according to your patent A in the future.
Add other technical features B and C, even if it was awarded by China National Intellectual Property Administration.
It also falls within the protection scope of your patent a.
Without your permission, no one may produce and sell products including patented technical solutions.
It should be noted that the protection period of authorized inventions is 20 years, and the protection period of utility models and designs is 10 year.
And you have to pay the annual fee on time to ensure that your patent is always valid.