According to the official website of Shenzhen Great Wall Development Technology Co., Ltd., the company is a high-tech enterprise engaged in R&D production and sales. Founded in 1985, it is mainly engaged in the production of R&D and computer software, hardware, communication, smart cards, digital TV and other fields. Although the company has certain strength and influence in the technical field, it does not engage in third-party callback business. Therefore, it can be concluded that Shenzhen Technology is not a third-party company.