Yes The Tanzhou Education app in 2020 has a contract. The purpose of tamper-proof is to ensure the legal effect of the whole process of electronic contract signing. There are many scenarios in which electronic contracts can be applied in the education industry, such as enrollment process, enrollment process, student loan process, tripartite agreement for graduation, teacher contract and so on. Tanzhou Education, which belongs to Hunan Tanzhou Education Network Technology Co., Ltd., entered the online vocational education industry in 2007 [62]. It is a comprehensive education brand with large scale, rich teachers and numerous educational products. Its products have covered IT Internet, design and creation, practical foreign languages and other teaching categories, and more than 200 SKU courses have been offered.