With the rapid development of mobile Internet, all traditional industries are being overhauled, said Song Wei, founder of World O2O Organization at the World O2O Expo on Saturday in Beijing.

"Given the background of 'new normal', China's strong consumption market attracted tens of thousands of entrepreneurs to ride the mobile Internet start-up wave, especially the O2O (online to offline) sector," said Song.

World O2O Expo, hosted by Guanghe Capital, aims to promote the stable development and continuous increase of O2O industry in China and build entrepreneurship and innovation in the field.

The event, the most influential O2O expo globally, attracted more than 1,000 companies from 10 countries in the world.

"O2O will be the focus of mobile Internet startups in 2015," said Song, adding "more good mobile Internet companies will be created in the field."

In December, Dalian Wanda Group Co, China's biggest commercial real estate developer, invested in 99Bill Corp, a Chinese third-party payment platform to step into the nation's O2O market.

"O2O is the biggest pie in e-commerce," said Wang, according to a Reuters report.