WPP expands growth in China

■ Advertising giant WPP has continued its expansion into China with the purchase of communications agency ArtM. The Beijing firm, which has offices in three other major Chinese cities, will be absorbed by WPP subsidiary Grey. The acquisition is the latest Chinese buy from WPP, which counts the country as its third-largest market. ArtM’s price was not disclosed, but gross assets in 2011 were 157m yuan (£15.8m).