Certificates Posted by lulu.huang on 2022-06-27▍ Acquired Professional Certifications; Guaranteed Service Quality [Certificate] Tony Construction Co., Ltd.- CNS 450001:2018[Certificate] Tony Construction / Test Cin M&E Engineering Co., Ltd.- CNS 450001:2018[Certificate] Test Cin M&E Engineering Co., Ltd.- ISO 9001 2015[Certificate] Tony Construction Co., Ltd. -ISO 9001 2015