Citroen Racing will swell to a four-car World Touring Car Championship team this year after confirming Ma Qing Hua will race with the manufacturer full-time in 2015.

The former F1 test driver made a handful of appearances in the firm's dominant C-Elysee last season to help promote the brand in his native China, but went beyond expectations by clinching a win on his debut in Russia and another podium on home soil in Shanghai.

As a result, Hua was tipped to step up to WTCC full-time with Citroen in 2015, albeit with the new satellite Sebastien Loeb Racing entry, but has now been confirmed as part of a four-strong line-up in the official factory team.

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"I'm really happy to be carrying on with Citro?n. As soon as I arrived in the team, I felt like part of a family. I have learnt a huge amount with Citro?n Racing and through the other drivers. Competing in every round of the championship marks a new stage in my career. I know that Citro?n are counting on me, and I promise to give it my all."

Citroen, which made its WTCC debut in 2014, dominated the season with its driving combination of Hua, Jose Maria Lopez, Yvan Muller and Sebastien Loeb, scoring 19 wins in 23 races and locking out the overall top three in the drivers' standings.

With China proving a significant market for Citroen, the firm's marketing director Julien Montarnal is delighted to be welcoming Hua on board as a driver that combines speed with commercial clout.

"China has become Citro?n's biggest market in terms of sales. Welcoming Ma Qing Hua, a high-quality Chinese driver, into our team has already enabled our brand to boost its profile among a population that is just beginning to discover motorsport. Our ambition is to continue to move forward together. Ma is a perfect ambassador for Citro?n, on track and off."

The first WTCC test of the season begins on Friday, with Sebastien Loeb Racing set to be present with the already confirmed Mehdi Bennani. It remains to be seen whether the team will enter a second car as originally planned.