China is a complex country with no transparency due to her political system. China was mistreated by western powers in 19 and 20 century. China was humiliated by Japan in World War II. After Mao started cultural revolution, China showed herself as a unpredictable but paranoid country. China showed wrong public relations like she attacked India and Vietnam for no reasons. Battle hardened defeated China. Presently China like rouge country countries like Pakistan, North korea, Sudan, CPM of India, etc. Japan has adopted passive policy in defense. Why india should worry? India has to create defense as a deterrent only. India is not expansionist country. China has problems with peaceful neighbors like India, Japan, Vietnam and Phillipines. China has to watch if she makes over calculation to attack these countries, she wuill loose every thing like Germany. No one will help China after that like they did to Germany.