The Biggest Suspect

Wu Xiumin then said, "Han Kuan also said that in the last academic year before graduation, the school arranges internships for students. So, he should have returned to the Golden City oil factory. However, because of some problem with his application, Han Kuan had to apply for a new work permit, so he had to wait until the second half of the year to do his internship."

Wu Xiumin then explained, "Originally, Han Kuan planned to go back to Golden City to wait, but he happened to meet a teacher named Lang Xiangyang. After Mr. Lang retired, he and his friends started a sales company that sells teaching equipment in Beiqian. Mr. Lang thought that Han Kuan was honest and smart, so he invited him to work for his company and promised him a generous salary."