I shall now compile a list of words that Matthew knows:

1. Feng1 Shan4 (electric fan in mandarin)
2. Lan2 Tian1 Bai2 Yun2 (blue sky white cloud)
3. Bed
4. Book
5. Milk
6. Deng1 (light in mandarin)
7. Pear
8. Apple
9. Cat
10. Fei1 Ji1 (aeroplane)
11. Che1 (car)
12. Bird or Niao3
13. Banana
14. Papaya
15. Cao3 Mei2 (strawberry) - my mom successfully grew some strawberries in her garden. vv small ones, but still they are strawberries!
16. Hua1 (flower)
17. Elmo (red monster from Sesame Street)
18. Cookie Monster (blue monster from Sesame Street who eats cookie)
19. Winnie the Pooh
20. Rain

Of course, the list will grow. Although it's only 20 items, I think he knows more than we thought he knows... we will find out eventually!