Group 1 - Zhang Jianlong, former member of the Party Leadership Group of the Ministry of Natural Resources and former director of the National Forestry and Grassland Administration, is under investigation for serious violations of discipline and law [1] - He is the fourth senior official publicly reported to be under investigation by the Central Commission for Discipline Inspection and the National Supervisory Commission this year [1] - Zhang has a background in forestry, having graduated from the Inner Mongolia Forestry College in 1982 and worked in various capacities within the forestry sector for decades [1][2] Group 2 - Zhang Jianlong played a significant role in the construction of the "Three-North Shelter Forest Program," which is considered one of the world's greatest ecological projects, covering approximately 4.069 million square kilometers and involving over 600 counties [4] - The program has resulted in the afforestation of over 430 million acres, increasing the forest coverage rate from 5.05% to 13.02% over 40 years [4] - Zhang has publicly addressed controversies regarding the program's impact on wind speed and air quality, asserting that while afforestation can influence local conditions, it is not a solution to smog issues [4] Group 3 - The National Forestry and Grassland Administration, which Zhang Jianlong was part of, has seen multiple officials investigated in recent years, indicating a broader issue of corruption within the organization [5] - Notable cases include the investigation of former deputy director Li Chunliang and other officials within the administration, highlighting ongoing scrutiny and disciplinary actions [5]