Ying was a medic hat arrived in Chernorus after he had deserted the people's party of china's armed forces in order to run away from the corrupt Chinese government that had him let people die on the battlefield because they were not Chinese nationals. When he arrived in chernarus he traveled from town to town on the coast offering his medical services to people that were in need of them. Once in Elektrozavodsk he opened an underground clinic in an old shack on the edge of town. Due to his medical credentials not being recognized in chernorus he soon began to take the customers of the jealous medical staff that worked in the town hospital away from them. Later on, they ended up getting tired of him being competition with them and gave a tip to the police that there was a foreigner performing medicine without a license. Instead of arresting him the officers that had caught him forced him into leaving town and heading inland where he spent about 4 years in isolation studying the anatomy of animals that he had hunted in order to pass the time and survive. Over those years the outbreak had passed but due to his isolation, he was not aware that the outbreak had passed until he met an injured man that had stumbled upon in camp where he had spent 4 years alone. This startled Ying, because not only had he not met someone in all those years he was not expecting to find an injured person. Later that night the individual started exhibiting odd behaviors that made him violent which led to Ying having to put him down. This broke Ying in a sense he had never had to kill someone even in the military the thrill of the situation gave Ying an interest in figuring out what happened, therefore, he went to the town to see if he could further study the disease.