In China, it is considered rude to call someone by their first name unless the person is known for a long period of time. In work-related situations, people address each other by their title. At home, people often refer to each other by nicknames or terms of kinship. In Chinese culture, individuals often address their friends as juniors and seniors even if they are just a few months younger or older. When the Chinese ask for someone's age, they often do so to know how to address the person.