各位老师，这是怎么回事？如何改正？

"E:\Program Files\python\python.exe" C:/Users/jinanshui/Desktop/xksy.py
SyntaxError: Non-UTF-8 code starting with '\xc5' in file C:\Users\jinanshui\Desktop\xksy.py on line 31, but no encoding declared; see http:// for details

Process finished with exit code 1