tree command shown Chinese character as unicode (env) ➜  zhuaxia git:(master) ✗ tree /tmp/test
/tmp/test
└── 谢211220_3_8
    ├── album_description.txt
    ├── cover.jpg
    ├── 谢211220;210\230浩231_3_8.mp3
    └── 谢211220_3_8.mp3  

(env) ➜  zhuaxia git:(master) ✗ ls /tmp/test
谢安琪_3_8  

Using tree command, some Chinese character is displayed as Unicode, but ls is OK.
I have problems same as you, but I did Google and found the answer! Just add the option

tree -N /name_of_directory


man tree reads:

-N     Print non-printable characters as is instead of as escaped octal numbers.


Tell me if this still does not work!

Also, you seem to use zsh?? I am not familiar with that. I use bash, though.