Tranche Update on Beijing SDL Technology Co.,Ltd.'s Equity Buyback Plan announced on February 7, 2024.

Beijing SDL Technology Co.,Ltd. is a China-based company principally engaged in environmental monitoring, industrial process analysis, intelligent environmental protection, as well as the provision of related services. The Company's main products include gaseous pollutant monitoring, atmospheric environmental monitoring, surface water monitoring, wastewater monitoring, soil environmental monitoring, radiation and noise monitoring and emergency and laboratory testing, among others. The Company is also involved in the sale of analysis equipment and ancillary products, as well as in the provision of environmental protection operation and maintenance services and system transformation services. The Company operates its businesses in domestic and overseas markets.