In the immediate aftermath of his benefactor/boss Yim Teet San's death, Fok Teen Ching was adamant about fighting Luk Siu Fung to the death to avenge Yim Teet San. After Fok Teen Ching helped set Dook Goo 1 Hok up to be killed by Sai Mun Chui Sheut, Fok Teen Ching cordially invited Luk Siu Fung to share a meal and drinks with him, and even told Luk about the location of Fok Yau's secret pavilion. Why this change of heart, and how did it not arouse Luk Siu Fung's suspicion?