It is the duty of every citizen to honor the national flag. Why? Because the national flag is the symbol of a country. To respect it. it means to respect the country. In other words, if a man love his country, he must love the national flag.
In school, the national flag is usually raised at a certain time every day. Then the principle, teachers, staff and students are to stand before it and sing the national song, it is indeed extremely meaningful to attend such a ceremony.