Singapore-listed Yangzijiang Shipbuilding saw its share price rally by more than 7% on the news that the shipyard group’s chairman Ren Yuanlin is back at work.

The company's shares surged to SGD 1.07 ($0.79) to SGD 1.15.

The shipyard boss took a four-month break from the company in August to assist the Communist Party of China in an investigation of Jingjiang city official Liu Jianguo.