The Northern Qi King of Qingyu was Gao Yang.
Fan Xian's purpose in going to Northern Qi was to exchange for the imprisoned Yan Bingyun and complete the four missions Chen Pingping had given him. Fan Xian successfully ensured that Yan Bingyun returned safely and took over a position in the First Bureau. In addition, Fan Xian had also established a good relationship with the Northern Qi Imperial Advisor Ku He's disciple, Haitang Duoduo, and the Northern Qi Emperor, Zhan Doudou, to control the smuggling channels from the palace treasury to Northern Qi. Fan Xian had faced great danger on his diplomatic mission to Northern Qi, but in the end, he had successfully completed his mission.
The Qing Kingdom's strength was far greater than Northern Qi's. In " Celebrating Years," the Qing Kingdom was described as the most powerful country. It had a prosperous economy, a powerful army, and a Great Grandmaster who played a decisive role. Although Northern Qi also had some aces, they had always been suppressed by the Qing Kingdom in the war and lost miserably. Thus, according to the information provided, the Qing Kingdom's strength was clearly higher than Northern Qi's.
According to the information provided, in " Celebrating Years," Nanqing was described as the most powerful country with a prosperous economy and a powerful army. In addition, Northern Qi had many forces restraining each other, causing the morale of the army to be unstable. In the end, the Qing Kingdom defeated Northern Qi. The Qing Kingdom's ruling power was stronger than Northern Qi's. Thus, according to the information provided, the Qing Kingdom was more powerful than Northern Qi.
In "Celebrating Years", Nanqing and Northern Qi fought many wars. Although Northern Qi's martial prowess far surpassed the Qing Kingdom, they had been defeated repeatedly. The Qing Emperor believed that Northern Qi's failure was not because the country was weak, but because it lacked unity. The Qing Emperor knew very well that in a war, the unity of soldiers was the most important. Only by uniting as one could they display the greatest power. The Northern Qi people didn't realize this, causing the country to fall apart. In the end, they reaped what they sowed. However, the search results did not provide any details about the war between Nanqing and Northern Qi. Therefore, I don't know the exact details of the war between them.
The war between Nanqing and Beiqi did exist in the book. Although Northern Qi's martial prowess far surpassed the Qing Kingdom, they had been defeated repeatedly. This was because Northern Qi lacked unity, causing the country to fall apart. The Qing Emperor knew the importance of unity between soldiers to war, so he was full of confidence in the Qing Kingdom. Although the Qing Kingdom had won the war, they did not have the ability to destroy Northern Qi in one fell swoop. They could only fight for some regions. The Qing Emperor had many hidden dangers binding him, including Ye Qingmei's possible followers, the threat of several Grandmasters, Wu Zhu, who might have recovered his memories, and the chest he had taken away, the Temple's power, the temporarily established Qing Kingdom, and internal chaos. Thus, the Qing Emperor did not have the ability to unify the world. In summary, the war between Nanqing and Northern Qi in " Celebrating Years " did exist, but the Qing Kingdom did not have the ability to completely defeat Northern Qi.
During the Qing years, there were wars between Nanqing and Northern Qi. Although Northern Qi's martial prowess far surpassed the Qing Kingdom, they had been defeated repeatedly. Northern Qi lacked unity, causing the country to fall apart. The Qing Emperor knew the importance of unity between soldiers to war, so he was full of confidence in the Qing Kingdom. The Qing Kingdom had won the war, but they did not have the ability to destroy Northern Qi in one fell swoop. They could only fight for some regions. The Qing Emperor faced many hidden dangers, including Ye Qingmei's possible followers, the threat of several Grandmasters, Wu Zhu, who might have recovered his memories, and the chest he had taken away. The Temple's power, the temporarily established Qing Kingdom, and internal chaos. Thus, the Qing Emperor did not have the ability to unify the world. In summary, the war between Nanqing and Northern Qi in " Celebrating Years " did exist, but the Qing Kingdom did not have the ability to completely defeat Northern Qi.
During the Qing years, there was a war between Nanqing and Northern Qi. Although Northern Qi's martial prowess far surpassed the Qing Kingdom, they had been defeated repeatedly. This was because Northern Qi lacked unity, causing the country to fall apart. The Qing Emperor knew the importance of unity between soldiers to war, so he was full of confidence in the Qing Kingdom. Although the Qing Kingdom had won the war, they did not have the ability to destroy Northern Qi in one fell swoop. They could only fight for some regions. The Qing Emperor had many hidden dangers binding him, including Ye Qingmei's possible followers, the threat of several Grandmasters, Wu Zhu, who might have recovered his memories, and the chest he had taken away, the Temple's power, the temporarily established Qing Kingdom, and internal chaos. Thus, the Qing Emperor did not have the ability to unify the world. In summary, the war between Nanqing and Northern Qi in " Celebrating Years " did exist, but the Qing Kingdom did not have the ability to completely defeat Northern Qi.
In the years of Qing, Nanqing and Northern Qi fought many wars. Although Northern Qi's martial prowess far surpassed the Qing Kingdom, they had been defeated repeatedly. This was because Northern Qi lacked unity, causing the country to fall apart. The Qing Emperor knew the importance of unity between soldiers to war, so he was full of confidence in the Qing Kingdom. Although the Qing Kingdom had achieved some victories in the war, they did not have the ability to completely defeat Northern Qi. They could only fight for some regions. The Qing Emperor faced many hidden dangers, including Ye Qingmei's followers, the threat of several Grandmasters, Wu Zhu, who might have recovered his memories, and the chest he had taken away. The Temple's power, the temporarily established Qing Kingdom, and internal chaos. Thus, the Qing Emperor did not have the ability to unify the world. In summary, the war between Nanqing and Northern Qi in " Celebrating Years " did exist, but the Qing Kingdom did not have the ability to completely defeat Northern Qi.
The war between Nanqing and Northern Qi did exist in the Qing years. Although Northern Qi's martial prowess far surpassed the Qing Kingdom, they had been defeated repeatedly. This was because Northern Qi lacked unity, causing the country to fall apart. The Qing Emperor knew the importance of unity between soldiers to war, so he was full of confidence in the Qing Kingdom. Although the Qing Kingdom had won the war, they did not have the ability to destroy Northern Qi in one fell swoop. They could only fight for some regions. The Qing Emperor had many hidden dangers binding him, including Ye Qingmei's possible followers, the threat of several Grandmasters, Wu Zhu, who might have recovered his memories, and the chest he had taken away, the Temple's power, the temporarily established Qing Kingdom, and internal chaos. Thus, the Qing Emperor did not have the ability to unify the world. In summary, the war between Nanqing and Northern Qi in " Celebrating Years " did exist, but the Qing Kingdom did not have the ability to completely defeat Northern Qi.
The specific chapter information about Fan Xian and the Northern Qi empress fighting Doudou was not mentioned. Thus, I don't know the specific chapters of Fan Xian and the Northern Qi empress in the last year of Qing.