Zhao Changhe might not have understood this before, but after receiving detailed explanations from the golden foil, he knew what Yue Hongling was referring to.0

Dual cultivation was indeed not limited to sexual intercourse. Theoretically speaking, even merely transferring a strand of one’s true qi to another person and them returning it to you could be considered a form of dual cultivation. It was quite a broad concept.0

However, the harmony of yin and yang energies was not achieved simply by physical transmission. It required the interweaving of Taiji[1]; in other words, it required forming a connection that allowed both parties to exchange and blend their energies through orifices in each other’s bodies.0

Of course, there was a commonly used opening for dual cultivation. However, the mouth was in fact the most obvious orifice in the human body.1

The best practice constituted a connection both above and below, allowing for a much easier harmonizing of yin and yang.4

This was indeed the most orthodox practice, and it was not just some random idea.0

But how did Yue Hongling know about this? Where had she learned about the theories and principles behind dual cultivation?1

Of course, in his current state, Zhao Changhe did not and could not think about these details. He slowly opened his mouth in a daze, and soon...0