What does Tibetan Buddhism mean by "cultivating the wind pulse"?

"Wind" refers to the wind of life in the human body. "Pulse" refers to 72,000 pulses in the human body, mainly in the left, middle and right directions. There are three "bright spots". Forget the information at hand. You can look it up online.

This is the second stage of the supreme secret method, the second stage of perfection, also called Anu yoga (meaning unparalleled yoga). It is the secret method of practicing incarnation Buddha in order to become a Buddha. But you can't practice without initiation, and you will go to hell after you die. Even after initiation, there must be the first stage to do the foundation, followed by Maha yoga (big yoga).

I won't say any more. If you want to know, you can read it online and get to know it, but remember not to practice blindly in books or online. Tantric Buddhism is the most important teacher, and the cultivation methods of Tantric Buddhism must be enlightened by the master.