China is a weird case study from American perspective. The wide social media net that they have created around the globe is essentially ineffective in China. US can easily interfere with other countries as they can drive the media to do their talking. Youtube, facebook, twitter everything is available to them. But all their frustrations come from China.
None of these work in China. On top the social media in China is very nationalistic and anti-US. So any kind of pro-US sentiment easily is overshadowed. Also the language barrier, China still isn't much into English, so most western media is pointless for them. No wonder China is a very frustrating place to control for US. None of their usual tactics work for China.