Why do most supporters of a unified country come from the North?

And in the South—such as the Greater Bay Area and Jiangsu, Zhejiang, and Shanghai—many people have independent thinking.
Because Northerners want to claim other people’s honor as their own.
China’s economy basically depends on Jiangnan and Guangdong, and among the Eight Great Cuisines, seven are Southern cuisines.
China’s app software is developed by people from the South—people from Fujian; Xiaohongshu is from Hubei; Tencent is from Guangdong; Bilibili is from Zhejiang; Unitree Robotics is also from Zhejiang, and so on.
You could say that in the North, apart from the capital being in the North and the Northern dialect being chosen for Mandarin, everything else isn’t especially outstanding.
They’re afraid that if the North and South split, they won’t be able to brag about these honors anymore.
It’s like I’ve seen many Northerners who never went to Shanghai more than a few times in their whole lives, but when they brag to foreigners, they always have to mention Shanghai—like they’re Shanghai people!