Thomas and Raymond Kwok, the billionaire co-chairmen of Asia's largest developer Sun Hung Kai Properties, and Rafael Hui, Hong Kong's former No.2 public official, appeared at a Hong Kong court today to hear formal corruption charges against them.<br />This is Hong Kong’s biggest corruption case in 40 years. The charges come after investigations between government officials and the city’s tycoons. That has touched a nerve with angry citizens who are concerned at the wide spread corruption between a leading public figure and the two billionaire property developers.<br />After attending the one hour hearing where they were both formally charged, the youngest brother Raymond Kwok talked to a waiting press corp, saying in Cantonese, that he had done nothing wrong<br />"I firmly believe I haven't done anything wrong. The Hong Kong judicial system is very fair. I will do my best to defend myself against these accusations. My goal is to prove my innocence. Thank you."<br />Three others have also been charged in the Sun Hung Kai case. Thomas Chan, the Sun Hung Kai board member in charge of land purchases, Francis Kwan, a former banker and a former chief operation officer of the Hong Kong Futures Exchange. Thomas Kwok's lawyer declined to comment while lawyers representing the other four could not immediately be reached for comment.