Qingbai City wasn't small in terms of urban area, with its five districts spreading quite far apart. The most important third case in the Jingyang Line triple murder took place in Qingbai City.
Thus, Qingbai City and the provincial department had mobilized. According to experts, the murderer had to be someone very familiar with the railway lines and the train timetable, and at the same time, well-acquainted with the local situation. The latter point made the experts hold great expectations for Qingbai City.
After all, the population of Qingbai City wasn't large 20 years ago, and it was mainly composed of state-owned enterprise workers with little personnel turnover, increasing the probability of finding the murderer.
However, results did not meet expectations, and the case remained unsolved for over a decade. Although there had been attempts to restart the investigation, there were no results, and it continued to be shelved.