This poem can be said to express longing, or it can also express the feeling of being alone in a foreign land! It shows that he has gained insights into life! Express your feelings in a lonely environment! Men are not like this! Especially when facing setbacks! There is nothing you can do to change it! Life is like this, if you don't have long-term worries, you will have immediate worries! Miss it when you lose it, don’t cherish what you get! When we regret it, it may be too late!