Quickly pondering for a moment, Zhang Jin ultimately decided to leave with his team. When it comes to food safety matters, it's often a situation where "multiple jurisdictions are in play." It's not only their Food and Drug Administration and the police, many other departments can easily get involved as well.
Since Lin Gaoze, the captain of the criminal police, had personally come, it seemed to Zhang Jin that, at least from the police's standpoint, they were siding with Tianjiao Group, or rather, with Qin Ruojing. Zhang Jin preferred to interpret Lin Gaoze's presence as addressing an issue at the restaurant that indeed warranted police intervention.
More importantly, given the police's determined stance, even if Zhang Jin had his doubts, staying behind would mean challenging Lin Gaoze, which was not wise.
Indeed, he had taken some money, but offending Lin Gaoze over this was just too costly.
