The Chinese on Japan's UN Bid

Japan has recently been pushing for itself to be admitted into the UN Security council, but its biggest obstacle is the threat of China vetoing its bid. For Japan to take a permanent seat in the security counsel, it would require for an amendment of the UN constitution, and that would need an approval or an abstinence from China. However, China has been hinting that it will veto unless Japan gives a sincere apology for invading China during World War II. I agree with China, but would like to say that the PRC should offer a sincere apology for invading Tibet and the murder of students at Tiananmen Square demonstrations. Since China is such a fighter for human rights it is only appropriate that it set a good example itself.
Although, somehow I doubt that China will ever admit to any wrong doings on its part.