What do lovers mean by fighting in the wild?

It means that dragons fight in the wilderness, which is a metaphor for competition between groups.

2.

"Dragon and Tiger Leap" is the sixth divination of Kun Gua. The dragon is yang, and this stubbornness is yin, so the dragon war refers to the battle of yin and yang. Outside the city is the suburb, and outside the suburb is the wilderness. Huang Xuan refers to the colors of the sky and the earth respectively.

3.

Heaven and earth are the largest yin and yang, and their blood is mysterious yellow, which shows that the blood flowed from the war of yin and yang, which shows that this is a fierce battle. When it comes to personnel, it means fighting from top to bottom, and as for casualties and bloodshed.