Despite China's growth rate growing at its slowest pace in 24 years, Sir Martin Sorrell, CEO of advertising giant WPP told CNBC that he remained bullish on China.

"There's a lot of China bashing going on, particularly when the GDP is only growing by 7.4 percent," Sorrell told CNBC at the World Economic Forum's annual meeting in Davos, but "it's the delta, the increment that counts."