15. Country in which there are precipitous cliffs with torrents running between deep natural hollows, confined places, tangled thickets, quagmires and crevasses, should be left with all possible speed and not approached.

凡地有絶澗天井天牢天羅天陷天𨻶必亟去之勿近也

Sun Tzu

If an army is operating in a country with difficult terrain, such as steep cliffs, fast-moving streams, and narrow, confined spaces, it may be wise for the army to avoid the area or leave it quickly if it has already entered. This is because such terrain can be dangerous and challenging to navigate, and could put the army at a disadvantage in a military conflict. It may be safer and more strategic for the army to avoid these areas and focus on more favorable terrain.

A market with intense competition, complicated regulations, and limited opportunities should be exited from and not approached.

A market with intense competition, complicated regulations, and limited opportunities can be difficult and challenging for a company to operate in. Such a market may have many competitors vying for a limited number of customers, making it difficult for a company to gain a foothold and succeed. Additionally, the regulations governing the market may be complex and difficult to comply with, which can be a burden for a company. Furthermore, the limited opportunities available in the market may make it difficult for a company to grow and expand. In light of these challenges, the paragraph suggests that it may be best for a company to avoid entering such a market in the first place, or to quickly exit it if it has already entered. This is because the market may not be conducive to the company’s success, and focusing on more favorable markets may be a better strategy.