According to the analysis of his profile, there was definitely something fishy about Chang Qing's net worth. However, these would not be enough to directly incriminate him. They still need to gather what this guy had done in the past.
After returning to his office, Li Chao's group brought over the books of all 5 casinos and said, "Boss, the financial conditions of all 5 casinos are here. Other than the inflow source and outflow destination of the cash which we couldn't find, all of their profit and liquidity data are here."