This website contains all things related to college chemistry, chemistry olympiad, organic chemistry, analytical chemistry, biochemistry, inorganic chemistry, physical chemistry and so on. This website is expected to be useful for younger siblings and teachers in need. My great hope is that through this website the admin can channel valuable writings — sorry admin to all that I am not a smart person in the brain working on the site. Therefore the appearance of this website is quite simple. I consider this website as a means for me to channel knowledge that I have received thanks.