There are six agencies which I’ve seen to have the most presence in Asia. Two are local, the other four international. Each has their own sort of territory and/or specialty.
In Hong Kong CherryPicks, a recent international digital award winner reigns as a homegrown mobile agency. Based in Korea, Burson Marsteller has an extensive network in the region mainly in PR. In Guangzhou province, Ogilvy has a hold on translating foreign advertising to local markets. GroupM also in Shanghai, recently conducting the first ever largescale income group market research study. Egg is a good local one for digital, covering the country.*
When it comes to digital strategy though, Edelman in Beijing has been in the game since Renren was Xiaonei. Check out this video interview between former SVP Adam Schokora and Chinese Business Network Founder, Christine Lu.
You can find Christine Lu on Twitter: @christinelu. Adam has moved onto another project.
If you share my passion for China, I would also suggest joining the Chinese Business Network: http://www.thechinabusinessnetwork.com/
*Porter Novelli has some digital presence, however, Omnicom agencies really have had more success in traditional advertising in the region.