Through various clues, they identified a person who was a current official named Wang Yuantong.As a result, Su Wuming and Lu Lingfeng split up again. Su Wuming went to meet Wang Yuantong. Wang Yuantong was evasive after hearing the purpose of his visit. Su Wuming bluntly said that Wang Yuantong was the author of "The Biography of SARS".Lu Lingfeng was ordered to track down He Lanxue's whereabouts.With Xijun's help, Lu Lingfeng learned that He Lanxue might be hiding in the Youyuan Building in the ghost market, where old and faded singers gathered.