Belong to. Wanfang Academic Cloud is a Wanfang data knowledge service platform. According to the relevant regulations on publishing articles on this platform, we can know that the articles uploaded and published on this platform belong to Wan Wen, and their articles will be kept permanently and will not be made public again, so the authors of the articles can use them again. Wanfang is one of the three providers of paper testing databases in China.