Riviera TwinStar, Twin office towers in Huangpu District, China

Riviera TwinStar Square consists of two 49-storey office towers and two 18-storey secondary buildings on the Huangpu riverfront in Lujiazui. The American firm Arquitectonica and the East China Architectural Design & Research Institute designed the complex, built from 2008 to 2011; the towers reach 216 metres. Their outer facades carry a pattern resembling bamboo. Tower 9 houses the Shanghai headquarters of the Agricultural Bank of China, and the podium holds the Mandarin Oriental Pudong hotel.

The complex was built from 2008 to 2011 on the former Shanghai Shipyard riverside plot in Lujiazui, developed jointly by China State Shipbuilding Corporation and CITIC Pacific. Arquitectonica and the East China Architectural Design & Research Institute designed the two 49-storey towers, which reach 216 metres. Tower 9's floors 1–41 were bought by the Agricultural Bank of China for 3.77 billion yuan; the other tower houses China Construction Bank's Shanghai headquarters. As of February 2014 the twins ranked 25th among Shanghai's tallest buildings.

The towers' bamboo-like facade is a nod to the site's developer, CITIC Pacific, whose Chinese name includes the character for bamboo. The complex sits in the Lujiazui riverside financial district built on the former Shanghai Shipyard grounds, and its podium houses the Mandarin Oriental Pudong hotel.

The complex sits by the Lujiazui station of Metro lines 2 and 14, and the Taigong line ferry's Taitongzhan pier on the Huangpu is nearby. The two 49-storey towers and two 18-storey annexes share a podium occupied by the Mandarin Oriental Pudong hotel, so entrances differ by use. The site lies in the Lujiazui riverside financial district of Pudong.

The outer facades of both towers are shaped to resemble bamboo, a detail visible from street level and from across the Huangpu River. The two 49-storey towers are joined by two 18-storey annexes, and the podium below houses the Mandarin Oriental Pudong hotel.