Which opera house is the shell-shaped opera house?

There are two opera houses in the shape of shells:

Zhuhai Grand Theatre and Sydney Opera House

Zhuhai Opera House is the only opera house built on the island in China. Zhuhai Grand Theatre consists of two groups of shells, one large and one small, which constitute the overall image of the opera house, so it is called "the shell of the sun and the moon".

Zhuhai Opera House

Sydney Opera House, located in the convenient Dragon Point in the north of Sydney, New South Wales, Australia,1started construction in March 1959,1officially put into use on October 20th, 1973. It is a landmark building in Australia.