I had a friend visiting another friend in Beijing some years ago. She witnessed a young man stabbing at older man in an outdoor shopping area she was in. The perp left the older man bleeding. My friend, a foreigner in China, went, alone, to try to aid the victim. His attacker returned, saw my friend helping his victim and stabbed her, 17 times. She died there in Beijing.
Horrible.
How horrible! Prayers for her!