/usr/lib/python2.7/test/cjkencodings/big5hkscs.txt is in libpython2.7-testsuite 2.7.15~rc1-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2
�E�\�s�ڍ� �f�b�� ����