Sn suicide.

[Karangel25]

Sole survivor sheds light on suicide pact - Global Times

www.globaltimes.cn

In this article it says this guy was in pain but only survived because he called emergency services

 

[Meretlein]

Taking too much Sn will cause pain.

 

[OfficerK]

The article says both "nitrate" and "nitrite". Both are toxic, but sodium nitrite is more effective and fast-working. I also find it unlikely that they used anti-emetics or fasted ahead of ingesting whichever substance.

 

[jake3d]

It's China. They have a very high suicide rate so it is obvious that they will try to present the story in such a way as to discourage further attempts.