why I got UnicodeDecodeError when i use python3 readlines to read a file which contains Chinese characters? : ```
>>> path = 'name.txt'
>>> content = None
>>> with open(path, 'r') as file:                                                                                                                             
...     content = file.readlines()
... 
Traceback (most recent call last):
  File "<stdin>", line 2, in <module>
  File "/mnt/lustre/share/miniconda3/lib/python3.6/encodings/ascii.py", line 26, in decode
    return codecs.ascii_decode(input, self.errors)[0]
UnicodeDecodeError: 'ascii' codec can't decode byte 0xe5 in position 163: ordinal not in range(128)
```
When I run this code to read a file which contains Chinese characters, I got an error. The file is saved by using UTF-8. My python version is 3.6.5. But it runs ok in python2.7. 