2. Baoding Yishuiyuan Real Estate Development Co., Ltd. is a development company established by Hebei Yishuiyan Co., Ltd. for the development and construction of Yishuimingyuan project.
3. Hebei Yishui inkstone Co., Ltd. was established in 2004, and the company exclusively registered the "Yishui" brand trademark. In May 2006, the company was named as a national cultural industry demonstration base by the Ministry of Culture. In June, 2008, Yishui inkstone making technique was listed as a national intangible cultural heritage by the State Council. The company is the vice president of China Four Treasures of the Study Research Association, and has been rated as one of the top ten cultural enterprises in Hebei Province.