Wedding plans.
After the bureau's men left, Caishen recalled that he had not told them about Lai Yanfang's secret lair. It was a house in Shanghai, sitting on the grounds of a rice farm. In that place, they had found three skeletal remains which Biming asked sister Ning to help with identification.
At the moment, they were still waiting for her to bring back a report but the men were all under the impression that two knives was one of the skeletons.
Apart from that, Caishen realized that he had been left behind, forgotten by Aang who teleported him to the old mansion. Since it usually took the man no more than thirty seconds to teleported back and forth, the fact that ten minutes had elapsed without his return made Caishen conclude that he had indeed been forgotten.
He sighed and walked around the house to the parking lot. He got a car key from the many on a key rack and had one of the guards drive him back to the office.