Si Ren did not stay in Zhang Ran's office twenty-four hours a day. Instead, taking advantage of Zhang Ran's absences, he installed miniature cameras in the office to monitor his daily routine.
After three days of surveillance and observation, Si Ren gained nothing. Zhang Ran behaved completely normally, following a monotonous routine of arriving at work and leaving on time, and he refused to utter a single extra word in the office.
His home was not far from his workplace, less than two kilometers away. Security there was much more relaxed than at his office.
Chapter 577