Liu Xiao-yuan wondered if he should shut up (zh) in his Sinablog after Sina has deleted 4 of his posts including 1. an article on the clapping culture of 17th Party Congress (via sohu); 2. an article on the pace of political reform (via sohu); 3. Sina's crazy delete policy; 4. why Sina care about criticism if it is so keen on deleting post?