Zhixin Finance APP News, Guolan Testing (301289.SZ) announcement, the company's holding subsidiary Shanghai Chuanglan Testing Technology Co., Ltd. ("Chuanglan Testing") recently obtained the certification institution approval issued by the National Certification and Accreditation Supervision Management Committee. Certification business scope: Certification category: Product certification, Certification field: Power distribution and control equipment and its parts; Insulated wires and cables; Optical cables.