This would not be surprising at all if the Chinese had a secret police station in South Korea. I would assume though they would be running it out of their embassy to avoid detection:
![The Royal Canadian Mounted Police is investigating ″reports of criminal activity″ related to foreign police stations after Spain-based human rights group Safeguard Defenders reported that China is operating more than 50 overseas stations including three in the Greater Toronto Area. Here, one of the Greater Toronto Area locations noted is a building in a business park in the Markham area of Toronto on Oct. 31. [AP/YONHAP]](https://i0.wp.com/koreajoongangdaily.joins.com/data/photo/2022/12/21/333f6304-b866-4552-b007-785038235937.jpg?w=640&ssl=1)
Seoul is looking into the alleged presence of a secret Chinese police station in Korea, the Foreign Ministry confirmed Tuesday.
Joong Ang Ilbo
“We have been communicating with relevant departments on the matter,” a Foreign Ministry official told the press in Seoul on Tuesday. “At this point we do not have anything significant to share.”
The nongovernmental human rights organization Safeguard Defenders announced earlier this month that China’s local-level public security bureau based in Nantong, Jiangsu Province, was running at least one police station in Korea, though it couldn’t confirm its exact location.
You can read more at the link, but these secret police stations are suspected in 53 nations are and are used to monitor Chinese nationals in these countries.