The topic of HowNet is generally drawn up by the author according to his personal needs, which can be combined with his own interests, majors and abilities, or selected from the reference topics given by the tutor when writing the paper.
There are various sources of topics, such as the topics of undergraduate thesis. Usually the source is to learn to speak independently or the teacher provides the topic, or the department publishes the topic for students to choose. This is the source of several topics.