The Company and its subsidiaries (the “Group”) are engaged in productivity-driven equipment business for use in the semiconductor and solar cell business, and also operate an oil and gas production project in the People's Republic of China (“China”). In fiscal year 2023, the Company started the development and manufacturing business of innovative wafer manufacturing equipment (“WFE”) and solar cell production equipment. WFE includes high-end monolithic cleaning and LPCVD equipment for front-end wafer processing. Solar cell production equipment includes wet chemical cleaning equipment and copper plating equipment. The Company has established and acquired companies at home and abroad for the operation, development and manufacture of the above businesses (including LPCVD equipment currently under development), mainly including Shanghai Pudat Semiconductor Equipment Co., Ltd. (“Shanghai Pudat”), Pudat Semiconductor Equipment (Xuzhou) Co., Ltd. (“Xuzhou Pudat”), Shenghong Ye Semiconductor Equipment (Shanghai) Co., Ltd. (“Shenghongye”), Shanghai Pudate Equipment Technology Co., Ltd. (“Pudat Technology”), and Ruina Solar Technology (“Yiwu”) Rui “Nayiwu”). Xilingol Hongbo Mining Development Co., Ltd. (“Hongbo Mining”) is a subsidiary of the Company engaged in the sale of crude oil. The main businesses of the major subsidiaries and portfolio companies are set out below: Xuzhou Pudat was established on February 22, 2022. It is a wholly-owned subsidiary of the Company. The company is engaged in the manufacture of the above semiconductor and solar cell equipment according to the business needs of Shanghai Pudat and Pudate Technology. Xinkai was established on August 18, 2022. It is a subsidiary holding 69.2% of the company's shares. The company is engaged in the sale, development and manufacture of LPCVD high-end process equipment. Sheng Hongye, a company invested by the Group in 2022, is mainly engaged in semiconductor dry glue removal equipment and epitaxial equipment business in China. The Company actually holds 35% of Sheng Hongye's shares and classifies Sheng Hongye's investment as an interest in a joint venture company in the Group's comprehensive financial statements. Pudat Technology and Rena Yiwu are wholly-owned subsidiaries acquired by the Company on August 18, 2022. These companies are mainly responsible for sales, R&D and engineering services of solar cell equipment (including but not limited to cleaning equipment and copper electroplating equipment). At the time of completion of the acquisition, the company owned 100% of Pudat Technology and Rena Yiwu, and consolidated the financial results of the two companies into the financial statements. Hongbo Mining is a wholly-owned subsidiary acquired by the Company in 2016. The company is an operating company engaged in the exploration, development, production and sale of crude oil in China. In fiscal year 2023, its total sales volume was 306,715 barrels, and total sales revenue was approximately HK$0.1883 billion.