Lee Sungil was an excellent agent and him avoiding detection by Xia Lei during his time having him under surveillance was proof of this. This was also why Ahn Geungan had looked favourably upon him and sent him to China. 

Lee Sungil was also happy to sell his services to Ahn Geungan. There was a chance of promotion in addition to the high salary, and more importantly, Ahn Geungan was likely to be the next President of South Korea. How could he not do his best in his work for the future President? 

But this all ended an hour earlier and the situation for him made a turn for the worse. 

Lee Sungil opened his eyes an hour later to discover that he was in a dimly-lit room. He was on a chair and his arms and legs were tied to it; he could not move. 

No one lived in this room and spiderwebs hung all over the walls. There were a few posters on the walls and they looked to be 20, 30 years old based on the pictures of workers, farmers and soldiers; big brother workers holding hammers, women holding sickles and soldiers...