1. bai yang shu   chestnut   poplar   cedar   oak   Hint Half-n-half Clue   2. shan mao ju   beech   poplar   fir   pine   Half-n-half Clue   3. hua shu   maple   oak   beech   birch   Half-n-half Clue   4. li zi   fir   poplar   chestnut   pine   Half-n-half Clue   5. xue song   poplar   cedar   elm   pine   Half-n-half Clue   6. [sha;shan] mu   elm   pine   chestnut   fir   Half-n-half Clue   7. yu mu   elm   poplar   beech   fir   Half-n-half Clue