First of all, Beijing is the capital of China, the political, cultural and economic center, a densely populated big city, with a perfect underground transportation network and many underground shopping malls, parking lots and other facilities. Secondly, gymnasiums generally need high floor height and ventilation conditions, and the underground space is not suitable for building gymnasiums, nor does it meet the relevant regulations and safety requirements. Therefore, it can be asserted that Beijing is not an underground gymnasium.

If you want to find a gym in Beijing, you can search through various channels, such as searching for relevant information online, consulting local residents or sports enthusiasts, and consulting local gym chains. At the same time, we should pay attention to choosing a regular and safe fitness venue and abide by the relevant regulations and safety requirements of the venue.

In a word, Beijing is not a gym on the second floor underground. If you want to do fitness exercises in Beijing, you need to fully understand and choose to ensure your health and safety.