Complex sentence: On 10, May 2011 in a letter to the Legislative Council, he said those personal reasons were not real, and that the real reason he quit was related to Elizabeth Tse (謝曼怡) and John Tsang.
Split into simpler sentences: On 10, May 2011 in a letter to the Legislative council, he said those personal reasons were not real. That the real reason why he quit was related to Elizabeth Tse (謝曼怡) and John Tsang.