Guo Jingjing, left, and Kenneth Fok registered to tie the knots at the Fok family mansion in Hong Kong, on Nov 8, 2012. [Photo/CFP]

Retired Olympic diving champion Guo Jingjing has given birth to her first baby with Kenneth Fok Kai-kong, the eldest son of tycoon Timothy Fok, in Hong Kong.

"Jingjing and the baby, weighing 3.3 kilograms, are safe and sound," Kenneth blogged on Sina Weibo at 12:24 on Tuesday, adding his gratitude to medical workers, relatives and friends. He also expressed the joy of the whole Fok family at the baby's birth.

News reports a week earlier revealed the baby, the first fourth-generation born to the wealthy Fok family, reportedly worth 100 billion yuan ($20.9 billion), and Guo may receive a separate property worth 100 million yuan after the birth.

Guo, 32, tied the knot with Fok, 34, in Hong Kong on Nov 7 last year after eight years of dating.

The Chinese diving queen retired in 2011 after she bagged four Olympic gold medals and eight world titles.

Guo Jingjing, right, and her husband Kenneth Fok Kai-kong attend an activity in Hong Kong, June 9, 2013. [Photo/CFP]