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Henan Huanghe whirlwind Co., Ltd.,founded in 1979, listed on the Shanghai Stock Exchange in 1998, is a well-known manufacturer of diamond in the world. As the key high-tech enterprise, Henan Huanghe Whirlwind Co., LTD., is considered as the largest diamond production base in China, with total assets of 15.4 billion yuan and 20,700 employees,