Biology (or Chemistry) tutor for teaching lessons to children for all of ages

I will do my best to help students solve their difficulties in the scientific field, especially in biology, chemistry, and mathematics. I will ensure a rigorous and accurate answer to every question and provide detailed explanations for any doubts. My working hours are from 2 to 8 pm daily, including weekends and holidays. I come from China and have lived there for ten years. If you are interested in Chinese culture, you can also contact me. I welcome anyone who has difficulties to discuss with me at any time.