1999
▲December 1999, successfully passed ISO9002 certification.
▲In December 1999, ISO9002 quality assurance system successfully passed certification.
▲In 1999, Dongying Shandong petrochemical plant Lan fully operational.
▲In December 1999, ISO9002 quality assurance system successfully passed certification.
▲In 1999, Dongying Shandong petrochemical plant Lan fully operational.