It is strongly not recommended to buy paper data on Taobao and other platforms. First, buying paper data may involve infringement of others' intellectual property rights, which is unethical.

Second, these data may be inaccurate, the source is unclear, and lack reliability. Most importantly, if you use these data in your paper, you may be accused of plagiarism or plagiarism of others' achievements, which will bring you very adverse consequences, such as paper rejection and academic reputation damage.