Is Teacher Niu of Chengyitong School reliable?

Reliable. The website shows that Suzhou Chengyitong Technology Co., Ltd. is registered by the Administrative Examination and Approval Bureau of High-tech Zone (huqiu district) and has a business license. Its business scope includes technical service, technical development, technical consultation, technical exchange, technology transfer and technology popularization. Suzhou Chengyitong Technology Co., Ltd. (formerly known as Suzhou Jujunhe Information Technology Co., Ltd.), established on 20 17, is located in Suzhou City, Jiangsu Province, and is an enterprise mainly engaged in software and information technology services.