I want to split specific Chinese characters in some lines. Actually, it worked, but the position of the split character was wrong. How could I split it at right position?

I split Chinese characters by regular expression in python 3.6

```
str = '我到家'
pattern = '([\u4e00-\u9fa5]?(?:到))'
compiled_pattern = re.compile(pattern)
new_str = re.split(compiled_pattern, str)
print(new_str)

```

The output by my code is 

```
['', '我到', '家']

```

But what I want is 

```
['我', '到', '家']

```

How could I fix it and spit the character at right position?