Escape From the Library: Chapter 74 - Endless Stairs 01

After the murderer was taken away by the police, the exam for the ‘The Mystery of the Construction Site’ course at the Faculty of Architecture was officially over, and a passing message popped up in the hover box in front of everyone’s eyes at the same time——

Escape From the Library: Chapter 73 - The Mystery of the Construction Site End

Yan Kai and Zhao Liang’s mother, Zhao Dayong’s sister-in-law, Yan Hui, shared the same surname, whether he was Yan Hui’s real brother or not, at present, Yue XIngwen had only a theoretical speculation, there was no actual evidence, and there were still many doubts.

Escape From the Library: Chapter 72 - The Mystery of the Construction Site 12

Yue Xingwen sent a message on a chat channel, letting everyone to immediately come to the corner on the east side of the 6th floor of area C. Soon, the students ran over while panting heavily. 

Escape From the Library: Chapter 71 - The Mystery of the Construction Site 11

Whether Zhao Dayong was diagnosed with liver cancer or not, Yue Xingwen and Liu Zhaoqing went directly to his nephew Zhao Liang to ask, “Has your uncle not been feeling well lately? For example, he had poor appetite, nausea, vomiting, diarrhea and other conditions?”

Escape From the Library: Chapter 70 - The Mystery of the Construction Site 10

Yue Xingwen overheard the conversation between president Jiang’s personal assistant and the police. According to the personal assistant, after president Jiang signed an agreement with the workers’ representative on the construction site yesterday. The driver sent the two people on the way back, and president Jiang suddenly said ‘a little personal matter to deal with’, and then got out of the car in the middle of the way, and did not return to the hotel until late at night.

Escape From the Library: Chapter 69 - The Mystery of the Construction Site 08

Zhao Xuemei ran back to the dormitory and fell on the bed crying, crying so hard that the female workers nearby ran to comfort her. Yue Xingwen gave Lin Manluo and Qin Lu a wink, and the two immediately followed.

Escape From the Library: Chapter 68 - The Mystery of the Construction Site 07

Which of the three possibilities was most likely?