How many levels and households are there in the new constellation of Huake _ Huake?

Ruan Xinbo resigned as an adjunct professor at Huazhong University of Science and Technology in 2022, focusing on the research of power electronic conversion technology, aerospace power supply system, new energy power generation system and power electronic system integration project. The reason why I chose to leave Huake may be to concentrate more on my research field and pursue a more professional position.