?? ????? ?????? ?? ??? ?? ???way ???? ???? ??? ????? ????? ??? ???. ??? ?????? investment ???? ?? for ???? ??? ?? ??? ?? among ????? ??? ??directly ???? ??? ?? ????? ????. ?????? ??????? ??????: has effective on sales ?????? ??????? ??????: ???? ?? ???? ??????? do ?? ??? ?????? ??????? ??????: ^???? ??? ?? strengthen ?????? ????? ??