Where is the downwind launch site in Beijing? Is it downwind to search Xianghe county on Baidu map?

The so-called saying that the upper hand is on the water is a marketing word of modern real estate developers, which is simply not credible; If there is such a saying, why didn't the emperor build the capital in that windward place, but built the cemetery there? This kind of feng shui, think about it. If you build your house near the cemetery and don't brag about that place, would you like to live there?