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???? ????? ????? ???????? ????? ???????? (MHEC) ????? ????? ?????? ??????????? ?? ????? ????????? ?? ?????? ??? ??????? ???????. ????? ??????? ??????????? ?? ??????? ??????? ????? ???? ???????? ?? ???? ????? ?????? ??????? ??????? ???????. ???? ???? Zhejiang Haishen New Materials Co., Ltd. ?????? MHEC ???? ??????? ?????? ?????? ?????????? ???????? ???????? ??? ??????. ????? MHEC ?? ???????? ???????? ??? ???? ?????? ???????? ?????? ???????? ?????????. ????? MHEC ?????? ??? ??????? ?? ????? ?????? ???????? ??? ????? ???????? ??? ????? ?? ???? ?? ????? ???? ?? ??????? ??? ?????? ??????? ??????? ????? ??????. ??? ????? ?????? ??????? ?? ????? ?????? ?????? ??? ??? ????? ???????? ??? ???? ????? ?????? ???????.