baike.baidu.comは安全ですか？

This wiki website is not trustworthy since too much information has no reliable citation source. Many articles are copied from Wikipedia which is difficult to access for many places in Mainland, China. The articles and images on this website are poorly copyright-protected. Many of them may involve with copyright controversies and plagiarism. This wiki is professionally very poor. For example, most math related articles (i.e. the article about Topological Spaces) give totally incorrect information. As a result, this false information may make students totally confused. Even worse, nothing seems to get better since the wiki edit has very low participatory level. Compared to Wikipedia, this website has very low reference value, at least in my opinion.