Teachers are not only people who impart knowledge, but also explorers who constantly pursue Excellence in their professional fields. This paper will discuss the importance of teachers' professional development from three aspects: diversity, autonomy and sustainability.

diversification

Colleges and universities are the cradle of knowledge. Teachers not only cultivate talents, but also dig deep into scientific research. Every teacher has his own unique professional growth path, just like a unique tree, showing all kinds of elegant demeanor.

independence

Students with high academic qualifications, cutting-edge knowledge and full of energy keep teachers keen insight at all times. In this learning society, lifelong learning is not only a slogan, but also a teacher's daily practice.

continuity

Teachers' professional development is a never-ending journey. Every step is accumulation and every growth is a leap. This process runs through the whole career of teachers, making the road of education more radiant.