The first few titles of China Southern Power Grid are valid.

The top four are valid. According to the relevant public information, we can know the effective patent types in the top four patents of China Southern Power Grid and the position of the corresponding patent authors. China Southern Power Grid Co., Ltd. (hereinafter referred to as China Southern Power Grid) is a central enterprise supervised by the State Council State-owned Assets Supervision and Administration Commission. Headquartered in Guangzhou, it is a super-large state-owned key enterprise related to national security and the lifeline of the national economy.