There are English colleagues who can introduce some foreign books on English teaching methods

You can refer to the following books:

I. Principles of Language Learning and Teaching (4th ed.), H. Douglas Brown

II. Teaching by Principles An Interactive Approach to Teaching Pedagogy, H. Douglas Brown

III. Teaching by Principles An Interactive Approach to Teaching Pedagogy", H. Douglas Brown

3. "Techniques and Principles in Language Teaching (3rd ed.)", Diane Larsen-Freeman

4. Teaching Language in Context (2nd ed.), Alice Omaggio Hadley

V. Approaches and Methods in Language Teaching, Richards Jack C. and Rogers Theodore S.