A few hours ago, Song Lei decided to leave this place when he received news that Deke Shu would be here to attend Elliot's birthday party. He knew Deke's purpose in coming here was to meet him and demand an explanation for Mei Yin's injuries and Elliot's abnormal punishment. Before the older man could see him, Deke decided to run away first.
Plus, he was suspicious that the Tiffany program that Anxia took was a mere trap. Hence, he left the program and purposely put it on the table.
He hoped that when Deke or Loraine Shu entered his room and were interested in taking the program, they would die from being shot by the trap he set, and no one could escape the bullets from four different directions.