Look for the Zhangqiu Gao family tree and compare it to see if they have the same ancestors.

The seventh generation Gao Zhi, the high walled back street in Zhangqiu City, the eighth generation Gao Qian〃, the ninth generation Gao Fengqi, Zhangqiu Xiguan, the tenth generation Gao Fameng, the eleventh generation Gao Guangxian, the twelfth generation Gao Zhao, the thirteenth generation Gao Ru Jie (the second branch, good at doing business) Gao Rukun (the big branch, mainly farming and reading) Gao Ruxun (the third branch, the descendants will study and succeed.

At the age of seventy, Qianlong went down to the south of the Yangtze River and passed by Zhangqiu. He personally wrote a plaque with the inscription "Heaven opens the realm of longevity" and gave it to Gao Ruxun)