On 6 th Sep 2007, Dr Zhu and his wife Stella were invited by the Prime Minister the Hon. John Howard and Mrs. Howard to attend the state luncheon in honor of His Excellency Hu Jintao, President of the On 6 th Sep 2007, Dr Zhu and his wife Stella were invited by the Prime Minister the Hon. John Howard and Mrs. Howard to attend the state luncheon in honor of His Excellency Hu Jintao, President of the People’s Republic of China.