Yesterday's expressions of gratitude were mere formalities.
While General Sun's words seemed initiated by politeness, Zheng Sangge couldn't afford to be criticized for mistreating his savior. Despite General Sun's status, he felt compelled to honor the invitation.
However, with the recent suicides of the uncle and nephew in the Heavenly Mansion's prison, any potential leverage that General Sun and the Second Prince could exploit had dissipated. Given these circumstances, Zheng Sangge questioned whether General Sun would still extend his goodwill.
Familiar with the duplicity and varied behaviors of dignitaries a decade ago, Zheng Sangge's understanding deepened over time.