SINGAPORE - The court hearing to decide the mental capacity of wealthy widow Madam Chung Khin Chun, 87, has been adjourned to next week.

After the closed-door hearing which lasted for about an hour, Madam Hedy Mok's lawyer Peter Doraisamy told reporters that the hearing has been adjourned to next Thursday and Friday.

He declined to reveal further details on the medical report or what took place during the session.

In Sept, the Office of the Public Guardian (OPG) asked the court to appoint a medical expert to determine if she has the mental capacity to revoke the Lasting Power of Attorney (LPA) she gave to Yang in 2012.

The LPA, in effect, allowed Yang to control her assets estimated to be worth $40 million.

The wealthy widow, who has no children and was diagnosed with dementia this year, met the 40-year-old Mr Yang in 2008 while on a holiday in Beijing.

Yang, a Singapore permanent resident, is embroiled in a legal tussle with Madam Chung's niece over the widow's assets, which include her $30 million Gerald Crescent bungalow.

Explaining the latest move, an OPG spokesman said that the actions "are necessary to safeguard and protect the interests and assets of Madam Chung".

"The OPG will decide on the cancellation of the LPA after the court has made a determination on Madam Chung's mental capacity."

The spokesman added that the Public Guardian must be satisfied that the necessary revocation steps have been taken, before the LPA can be cancelled.

Yang is currently in remand and facing 331 charges for falsifying reciepts amounting to slightly over $450,000.