Recently, Google PageRank adjusted its stradigies on general pages and blogs, so my website was down to level 1 from level 3. This event let me think more seriously about my website. before, I discussed something all round the world, including sciences, technologies, nature, social problems, etc, but these topics are too broad to be discussed or viewed deeply, some of them, especially things on social issues are superfacially discussed. So I determined to redirect or restrict my website's topics on sciences, technologies and nature, but it does not mean that I will not care about social problems.
However, everybody is social, who is not out of the social group, so the social problems are related to everyone. I do not give up caring about society, but only here, these posts published on this site will be on more objective world.