What was the relationship between Yao Qisheng and Shi Lang during the reign of Kangxi?

The relationship between Yao Qisheng and Shi Lang is very complicated.

Mentoring relationship: Shi Lang studied under Yao Qisheng.

Relationship between friends and in-laws: Yao Qisheng recommended Shi Lang to Kangxi on the basis of the life of the whole family, which shows the deep relationship between them. Moreover, the two are also related by marriage. Yao Qisheng's brother-in-law is Huang Xiyuan; And Huang Xiyuan's brother-in-law is Shi Lang.

Relationship between colleagues and political enemies: Yao Qisheng was then the governor of Fujian, and Shi Lang was the prefect of Fujian Navy. They hold their own views on many issues, and the power struggle has deepened the contradiction.

Extended data

In the second year of Kangxi (1663), he was appointed as the order of Xiangshan County, Guangdong Province, and dismissed from office. After the San Francisco Rebellion, he donated money to recruit soldiers, was under the command of Kang Wangjue Luo Aixin, served as the county magistrate of Zhuji, and repeatedly offered ingenious ideas, and was in charge of Wenzhou, Zhejiang. In the 15th year of Kangxi (1676), he surrendered to Geng and moved to Fujian.

In the seventeenth year of Kangxi (1678), he was promoted to the governor of Fujian and took charge of the platform. In the 19th year of Kangxi (1680), he led the troops to conquer Haicheng, recapture the Jinfu, and forced Zheng Jing to withdraw from Penghu, making it the history of the Ministry of War, protecting the young and protecting the prince, and making it the capital of Shi Yu. In the 21st year of Kangxi (1682), he assisted Shi Lang, the navy's prefect, to recover Taiwan Province province. I didn't reward my merits, but I was depressed, and finally Fuzhou.

References:

Baidu encyclopedia-Yao Qisheng

Baidu Encyclopedia-Shi Lang