Can you talk about tantra and Zen? What is Zen?

I use modern words for example, and you will understand:

Buddhism is an educational discipline that reveals the laws of natural life in the universe and understands the truth.

Assuming that all religious groups used to spread Buddhism are merged into one university, then the university on this earth should be named "World Buddhist University", and the current president is the well-known Sakyamuni Buddha.

This university has three campuses, namely, Han Buddhism (located in Handi, China), Tibetan Buddhism (located in Tibet, China) and Southern Buddhism (located in Southeast Asia).

The courses and contents described by the three major school districts include two categories: low-level courses and advanced courses. The low-level course is called "secular law", which teaches everyone how to improve their present life and have a happy life, which can be described as "a win-win situation for both finance and intelligence". This result is also called "Fu Bao in the sky" or "Fu Bao in dragon day"); The advanced course is called "Out-of-the-World Method", which teaches you how to upgrade your life, and finally leave the earth to live in a higher dimensional space, where people's life span is prolonged (the shortest is from the 9 million years of the earth), their ability is enhanced (similar to the gods in the earth's cognition), and they continue to practice and become more advanced living beings (extraordinary). This result is also called "liberation from life and death, beyond reincarnation". Of course, due to the different qualities of students in the three major school districts, there will be certain differences in professional courses.

Each school district has set up many branch schools, which are commonly known as "temples". The principal of the branch school is the abbot or abbot, and there is also a respectful name called the monk. Those knowledgeable people are called "big monks" (so the name "monk" can't be yelled at). Teachers in branch schools are collectively called "monks", while students generally call monks "wizards" or "masters".

Therefore, your question is easy to explain:

Tantric Buddhism is a professional department under Tibetan Buddhism; Zen is a professional department under the Han Buddhism. The so-called "Zen" is to teach you how to look, how to look, and how to understand your heart.