
Emperor Qianlong made the best preparations for him every time he went on an expedition so that he could return victorious. For example, when Fukang'an put down Lin Shuangwen's uprising in Taiwan, Emperor Qianlong made the famous general Hailancha his deputy general to accompany Fukang'an on the expedition. In the 56th year of Qianlong's reign, when Emperor Qianlong appointed Fukang'an as the general to fight in Tibet, Emperor Qianlong appointed Hailancha as the minister participating in the war and followed Fukang'an on the expedition. Every time Fukang'an went on an expedition, Qianlong carefully selected generals for him and sent powerful troops to ensure victory. Even the Ministry of War and the Ministry of Household Affairs focused on Fukang'an's needs when balancing war allocations for each battlefield. These all paved the way for Fukang'an to win the battle.

Second, Qianlong broke the ancestral system for Fukang'an and actually made him king. After the Qing Dynasty entered the customs, enfeoffed Wu Sangui and other kings with different surnames, which led to the San Francisco Rebellion . Therefore, the Qing government ordered that the kings with different surnames should not be kings. However, Fukang'an was named the Prince of Jiayong County and was entitled to enjoy the Imperial Ancestral Temple. Fukang'an's two brothers were both excellent, but Qianlong never intended to confer royal titles on them. If they were crowned kings because of their military exploits, then why weren't Zhao Hui and Agui, whose military exploits were comparable to Fukang'an's, not crowned kings?

Third, Fukangan's two brothers were both summoned as consorts by Emperor Qianlong, but Fukangan, who was so favored, did not marry the princess. Qianlong's Jiu Gege and Fu Kang'an were only four years apart, and they were about the same age. However, Qianlong did not point out Jiu Gege to Fu Kang'an, and he did not even promise a clan girl to Fu Kang'an. This is also very suspicious. In fact, it is impossible to verify whether Fukangan was the son of Qianlong.
But historians believe that Fukang'an was not Qianlong's son. Qianlong's love for him was only because Qianlong saw in Fukang'an the figures of himself and the emperor's second son Yonglian and his wife Yongcong who died young after the title of Xiaoxian. Fukang'an was brought up by Qianlong, and he was also the nephew of Xiaoxian and pure empress , so he naturally loved him very much. When he grew up, Fukang'an did not disappoint Qianlong. He was brave and good at fighting and made many achievements.