Year 4 of the Hé Qīng period. It's been four months since the battle at Mangshan Mountain. Zhou. Ye, the capital city of Qi, has been peaceful without any attacks from Zhou that the people were so afraid of. The same year, in March.The Emperor Wucheng of Northern Qi abdicated the throne and Gao Wei, the Prince, ascended the throne. The name of the imperial era changed to the Tiān Tǒng period.