SHANGHAI: The visit by United States President Barack Obama to Shanghai has generated an unexpected business boom for some in the city.

A variety of T-shirts, bags, posters and trinkets with Obama's image are once again hot items here in Shanghai.

"It's the third time an Obama T-shirt has been popular. The previous two were after he became president and when he won the Nobel Peace Prize," said Gan Shuqin, owner of an online shop on Taobao.com. Her shop features an "ObaMao" T-shirt, with Obama's face superimposed over that of Mao Zedong, with the famous inscription reading "Serve the People wholeheartedly" at the bottom of the shirt.