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