What do you mean by lung lavage trip?

Lung washing trip is a figurative word, which is often used to describe traveling to nature or places with fresh environment and fresh air to help the body detoxify and relieve stress. Literally, there is no direct process of lung washing, but breathing fresh air in a healthy environment, thus reducing the pollution and pressure that may be encountered in urban life. "Lung washing trip" means that people choose to stay away from the busyness and pollution of the city and enjoy clean air and quiet environment in the mountains, forests, beaches and other areas in nature. This kind of travel helps to relax, relieve stress and make the body recover and adjust better.