When did Li Ka-shing start selling mainland houses?

It was sold for the first time on May 16, 2008, and signed an agreement with the American investment fund "Asia Pacific Land" to sell the "Century Business Guangchao Office Property" located in Changle Road, Shanghai for 4.438 billion yuan. In 2005, Hutchison Whampoa Land spent US$ 300 million to purchase the property, with an estimated income of HK$ 265.438 billion.