South Korea is not the enemy of China, both countries had suffered from Japanese atrocities during World War II when the Japanese Imperial Army had invaded both countries by killing, raping and committing atrocities on millions of women and children. However the US and Japan want to rally South Korea against China. Regarding why China needs aircraft carrier, same question could be asked to India and Japan which already has three helicopter carriers which could be converted to aircraft carriers. A country like Japan having committed crimes against humanity, which refused to apologize and pay damages and which are spreading revisionism in books has not right to have aircraft carriers. China is a country whcih has the right to have aircraft carriers just as all the four permanent members of the UN council and just like the UK, France, Brazil, India, Japan, Thailand, Italy and Spain which all have aircraft or helicopter carriers. So China should remain military weak so that the US could bully and bash it, that is why a military and technological embargoes are imposed on it but this will not prevent China to make its own weapons and become an economic and military superpower.