Plus d'info, en anglais :
http://english.peopledaily.com.cn/90782/8459176.html
Types of Permanent Residence Permit (PRP):
Green cards are classified according to the following categories: investment, employment, seeking family reunion with parents, dependants, and outstanding aliens.
To apply for a permanent resident visa, a foreigner must meet at least one of the following four criteria:
1. be a high-level foreign expert holding a post which promotes China’s economy, scientific and technological development or social progress;
2. Have made a large direct investment in China;
3. Have made an outstanding contribution of special importance to China;
4. Come to China to be with family, such as spouse, dependent minor, or senior citizen.
The Regulation also clearly defines that aliens who seek approval to reside permanently in China must stay for at least three cumulative months every year. If an alien is not able to stay for such minimum period for any reason, he/she must apply for approval from the department or bureaus of public security at the level of province, autonomous region or municipality directly in the place of his/her long-term residence, under the proviso that the cumulative period of residence in China must not be less than one cumulative year in five years.