Hebei Jinggong Construction Engineering Quality Testing Co. Ltd. has obtained the certificates for measurement attestation from the Province Administration of Quality and Technology Supervision. At present, it has "the witness sampling inspection qualification" "indoor environmental testing qualification" "the main structure engineering quality testing" and "building energy saving detection qualification" issued by the Hebei Provincial Construction Department. The company has created a comprehensive quality control system, specified the division of responsibilities of various departments and positions. It helps to control every link from the test sample till receiving the test report issuing effectively. To monitor all operation states relevant to quality testing and ensure the accuracy, reliability and impartiality of the test data.