The Socialist Federal Republic of Yugoslavia was a country that once existed.

The Soviet Socialist Republics Union was a country that once existed.

Whenever he faced a difficult situation, he always said, 'The best of the Thirty-Six Stratagems is to run away.'

He warned the young people, saying 'At thirty, one should not be careless, at forty, one should not be indecisive.'

He faced difficulties with the spirit of 'one eye, two feet, three gallbladders, four strengths'.

This is a model of a mutetrahedron.

This mutetrahedron has a very unusual shape.