Mathematically, proof is the process of deducing some propositions from axioms and theorems according to certain rules or standards in a specific axiom system.

Recently, the launching ceremony of the grassroots electronic authentication system in Hebei Province was held in Tayuanzhuang Village, Zhengding County, Shijiazhuang City. Grass-roots electronic authentication is a concrete practice of the provincial government service office to innovate the administrative management mode and improve the service level of people's livelihood by digital means. At present, the system has been officially applied in Zhangjiakou City, Xiong 'an New District City and Zhengding County, and will be popularized in the whole province in September.