??? ???? ????? ?? ????? ???? ???????? AD ? ?????? ??????? ???????? AD ?? ???? ????? ?????? ??????? ????? Yonggao ???????? ? ?? ?? ?????? ???? ?? ???? ?????? ? ????? Guangdong Yonggao Plastic Industry Development Co. ? Ltd. ? Shenzhen Yonggao Plastic Industry Development Co. ? Ltd. ? Shanghai AD Building Materials Development Co. ? Ltd. ? Tianjin Yonggao Plastic Industry Development Co. ? Ltd. ? Chongqing Yonggao Plastic Industry Development Co. ? Ltd. ? Anhui Yonggao Plastic Industry Development Co. ? Ltd. ? Hunan AD Building Materials Co. ? Ltd. ? ??? ??? ??? ? ?? ????? ???????? ??????? ????? ? ???? ??????? ???? ????????? ???? ?????.

AD ???????? ??????????? ??? ??????? ???????? ? ??????? PVC ? ?????? ?????? ? ?????? ???????? CPVC ? ?????? ???????? MPP ? ???????? ???????? PVC ??????? ????? ??? ?????? ???? ? ????? ????? ???? ?????? PE ? ?????? ??? ????? PVCU ? ?????? ??? ??????? ????? ???? ? ???? AD ? ?????? ????? ?????? PPR ? ?????? ????? ?????? PE ? ?????? ????? ?????? PVCU ? ???? ?????? ????? ???????? ???????? ????????? ??????? ?????? ??????? ????? ????? ????? ???? ???????? ??????????? ? ?? ???? ???? ??? ???? ????? ???? ???????? ??????? ???????? ? ?????? ?????? ?????? ??? ???? ???? ?? ???? ??????? ?????? ?????? ????? ? ???????? ??????? ? ?????? ???????? ???????? ? ????? ??????? ? ?????? ?????? ????? ? ?????? ?????? ?????? ?????? ??????? ?? ???????? ??????.

?????? ?? ?? ??????? ?????? ???? Hubei AD Pipeline Factory ? Hubei AD Building Materials Co. ? Ltd. ? Hubei AD Bellows ? Jingjie Double Wall Bellows ? AD PPR Pipes ? ??? ? ???? ?????? ???????? 17399989993