Group 1 - A resident reported that Guangdong Jinkun Industrial Co., Ltd. has been illegally discharging wastewater into a nearby river, which flows into the Pearl River Estuary [1][7] - The company was observed sealing a drainage pipe overnight after being notified of the investigation, raising suspicions of evidence destruction [1][9] - The company, established in 2014, specializes in the research, production, and sales of deep-processed plant oil products, occupying an area of 33,000 square meters with a total investment of 200 million yuan [5] Group 2 - The resident conducted a month-long investigation, noting that approximately half the time the river was contaminated with wastewater, which appeared reddish-brown [4] - The wastewater from the company's production process contains high concentrations of pollutants, posing significant environmental threats [5] - Previous violations by the company include a penalty in July 2017 for breaching solid waste management regulations [9]