Henan Huanghe Whirlwind International Co., Ltd. was a sole subsidiary of Henan Huanghe Whirlwind Co., Ltd., a listed company on Shanghai Stock Exchange in 1998. Huanghe Whirlwind specializes in industrial diamond and diamond tools. It is the largest synthetic diamond manufacturer and top three comprehensively in the world with the annual production of 1.2 billion carats. The diamond series products with “China Top Brand” have been sharing high reputation in global market.