Being able to stop in such a critical moment clearly showed the importance he attached to Chen Qing's existence.
The King of Qin also realized that the Divine Path probably recognized the spirit body instead of the flesh body. Once Chen Qing died, it was highly likely... that the Divine Path would collapse, and all the foundational military strength accumulated in Jiangnan, which he envied to the point of jealousy, might vanish into thin air. The key was Chen Qing's miraculous system.
According to Jiang Xiaoling, Chen Qing's Divine Path required officials appointed by the Emperor to found it and needed a special imperial decree to use. Given the current situation, with the Emperor's astuteness, he was likely not to let himself easily obtain an official mandate from the human path again.
It's not that it couldn't be replicated, but the difficulty of implementation was not only great, the time cost was also probably not allowed anymore.
