1, square k: Julius Caesar, whose real name is gaius iulius caesar, whose historical name is Julius Caesar, was born in a noble family and became the founder of the Roman Empire with outstanding talents;

2. Plum blossom K: Alexander the Great, born in the kingdom of Macedonia in 356 BC, is a person admired by Julius Caesar and is the first of the four major military affairs in European history;

3. K of hearts: Charlemagne, also known as Charles Karl the Great, was the founder of the Holy Roman Empire. Charlemagne has been in power for more than 40 years, not only conquering more than half of Europe, but also being crowned as "Roman Emperor" by the Pope and called "Father of Europe" by the later Buddha.

4. Spades K: King David, the father of the famous King Solomon, is described as the most just king and an excellent warrior, musician and poet.