????????? ???????? ??????????? ????? ?? ??????, ??????? ???? ???????? ????? ??????????? ?????????? ?? ??????????????? ???????? ????? ?? ?????. ???????? ??? ?? ?????? ???, ????? ??????? ???? Hpmc, ??? ??????? ?????? ?? ???? ????, ???? ??? ?????? ??????????? ?? ???? ????? ??? ?????. 1990 ??? ????? ???? ?????????? ???? ???????????? ?? ??????????? ?? Zhejiang Haishen New Materials Co., Ltd. ??, ????? ???????? ???????????? ?? ?????????? ???? ?????? ????? ???? ???????? ???????? ?????? ????? ??? ??? ?????????? ????. ??? ?????? ????? ??????? ???? Hpmc ?? ??? ???? ?? ????????? ???? ??, ????????? ??? ?????? ?????? ?????, ??? ?????? ??????? ?? ????? ????? ????? ???? ?????? ?????? ?????? ?? ?????. ??? ???? ??????????? ??????????? ???? ????? ???? ????? ??????? ?????? ????? ???? ???, Zhejiang Haishen New Materials Limited ???? ??????????? ??????? ??? ???????? ??????? ????? ??????? ??? ???? ????? ?????? ?? ??? ??? ???, ???? ?????????????? ??????? ??????????? ???? ???????????? ????? ?????? ??????? ??? ????.