Most editions tie this stick to Li Yuan taking the throne; one gives a different battle story as an alternative. Li Yuan was a Sui general stationed at Taiyuan while the dynasty fell apart under Emperor Yang, with revolts and rival claimants everywhere. He did not move early. He raised his army in 617, took the capital at Chang'an, and only after Emperor Yang was murdered by his own officers at Jiangdu in 618 did Li Yuan declare himself emperor, founding the Tang. The match with a middle stick about the waxing moon is direct: Li Yuan waited through the half-formed nights of the old order, and when the time was full, the throne came to him with little left to oppose it.