It seems that China is still incorporated as a country in the Chronology of Dreamfall. The China of 2219 is evidently of major importance internationally, as the world's currency seems to have changed from the pre-Collapse dollar to the Chinese Yuan.
The Chinaman of Venice tries to sell Zoemobile phones from the country, which he describes as "cheap" and of "top quality". While this may be simple salesman's exaggeration, it is possible that writers Ragnar Tornquist and Dag Scheve have inverted the current situation in which products of Chinese manufacture are considered of poor quality. They seem to be a major producer of mobile phones, which would put them into competition with other bases such as the African country of Ethiopia.
China has a famous model, Vivian Zhu.