I have just submitted my naturalization application, can you keep us update on this matter, I m going to need to apply mainland Chinese Visa too

Here are what i found that might help?
According to Chinese nationality law Article 9: Any Chinese national who has settled abroad and who has been naturalised as a foreign national or has acquired foreign nationality of his own free will shall automatically lose Chinese nationality.
It did use the word 'automatically'.
Although I just found on Embassy Website http://gb.china-embassy.gov.cn/eng/visa ... 383966.htm
Basic documents required for visa
Point 4 did state that Photocopy of previous Chinese passports or previous Chinese visas (applicable to foreign nationals who once held Chinese nationality)
The Chinese passport last held and a photocopy of its data page and permanent residency of foreign country and naturalization paper are required when applying for a Chinese visa for the first time