China has stepped up its campaign against foreign espionage with a website in Mandarin and English encouraging people to report national security threats such as bids to "overthrow the socialist system".
The website, www.12339.gov.cn, launched by the Ministry of National Security on Sunday, also urges anyone to report attempts by Chinese nationals or foreigners to bribe state or military officials, instigate armed riots or incite ethnic separatism.
Potential problematic behaviour also includes foreigners meeting "any person within China who has conducted activities endangering state security or is strongly suspected of doing so" - raising concerns that any interaction with dissidents would be frowned upon.