<p>I am a Cantonese and Mandarin native speaker. I am living in Canada now. We can learn/teach Cantonese and Mandarin from the teaching materials as well as by talking about culture, science, and society.</p><p>As for myself, I have a Ph.D. in material science, especially in nanomaterials and biomaterials. My professional background involves biology, chemistry, and material science. Hence, we can discuss these subjects in different languages. I also have an abundant record in academic writing. I have published a few scientific articles in various journals, for example, Progress in Materials Science (IF:48.165). Thus, I can offer my professional opinions on your projects and/or essays. </p>