The historical background of the first "Assassin's Creed" was the Third Crusade (1189-1192), and the Mongolian Western Expedition had not yet arrived (the first Western Expedition of the Mongolian Army began in 1219, and the third Western Expedition that reached the Mediterranean coast began in 1253), so it did not involve ancient Chinese content.
The prototype of the Assassin Organization is one of the branches of the Islamic Shia Ismaili sect. He was famous for his good at assassination, and later died in the Mongolian Western Expedition. The prototype of the Templar Organization is naturally a historical Catholic religious military organization. It is named after its base is built on the ruins of the Temple of Solomon. Later, he became a victim of the struggle between royal power and religious forces and was destroyed by King Philip IV.
This requires our teachers to clearly see that the first generation of Assassin's Creed was as "faithful to the original" as possible in terms of historical and cultural background knowledge. The protagonist Altaïr was more like a witness of history, mechanically executing the orders issued by his master to assassinate the Templars and other major enemies, rather than the promoter of Chinese history.
Matyaf in the original book "Assassin's Creed: Secret Jihad" is probably adapted from the historical assassin's headquarters Alamut. Mattiaf and Alamut are two different places