There is a big river at the foot of Yin Mountain. I don’t know where it comes from, and I don’t know where it flows. It is the famous River Styx.

The Styx River made a circle around the Yin Mountain, bringing rich Yin spiritual energy and attracting a group of ghosts and immortals to settle here.

Lu Shanguan and Dong Xiaowan left Fengdu City, followed the Styx River upstream, flew more than five thousand miles northwest, and arrived at the foot of Yin Mountain.

Many ghosts and immortals live on the outskirts of Yinshan Mountain, building houses and opening caves on the mountain. As time goes by, towns and cities are formed.

There is a small town on the east and west sides of Yinshan Mountain. The one on the east side is called "Heizao City" and the one on the west side is called "Heima City".

In the inner layer of Yinshan Mountain lives the northern ghost emperor among the five ghost emperors.

There are two ghost emperors in the north, one is named Yang Yun and the other is named Zhang Heng.

Before Dong Xiaowan came to Yinshan, he had already searched for the background information of these two ghost emperors, and got very little information.

It is said that Yang Yun is the Taoist immortal in Ge Hong's "Baopuzi". His prototype may be Yang Xiong, a great litterateur in the Eastern Han Dynasty. And another ghost emperor, Zhang Heng, was also a person from the Eastern Han Dynasty and an outstanding astronomer and mathematician.

, inventor, geographer, writer.

Zhang Heng's astronomical works include "Lingxian" and "Annotations on the Armillary Sphere"; his mathematical works include "Suan Wang Lun"; his literary works include "Er Jing Fu" and "Guitian Fu" as representative works, together with Sima Xiangru and Yang Xiong

, Ban Gu is also known as the "Four Great Masters of Han Fu". Due to his outstanding contributions, the International Astronomical Union named a crater on the back of the moon "Zhang Heng Crater", and the 1802 asteroid in the solar system was named "Zhang Heng Star". Later generations

To commemorate Zhang Heng, the Zhang Heng Museum was built in Nanyang.

As for why these two Eastern Han people became Ghost Emperors of the North after their death, and what changes they experienced that caused their skills to soar and surpass ghost immortals, ghost kings, and ghost emperors to become ghost emperors, there must be a reason.

After Lu Shangguan came to Heizao City, he inquired with the ghost fairies in the city and learned some interesting things. It turned out that the reason why Yang Yun and Zhang Heng became ghost emperors was because they went to the underworld after death and were recruited by Gui Guzi as

Because of the disciples.

The world doesn't know that Guiguzi is the incarnation of the ancestor of Styx.

Guiguzi has a palace on the main peak of Yinshan Mountain. The gate is opened every ten thousand years to recruit two young disciples.

When Gui Guzi left the underworld and traveled around the world, he also recruited disciples. He recruited disciples in pairs. The first pair of disciples were Sun Bin and Pang Juan, and the second pair of disciples were Su Qin and Zhang Yi.<

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Gui Guzi had evil intentions and prompted his disciples to fight each other. Pang Juan dug out Sun Bin's kneecaps, and Sun Bin shot Pang Juan dead in Maling. Su Qin hung the seal of the Six Kingdoms and lobbied all countries to join forces to attack Qin; Zhang Yi, as the prime minister of Qin, proposed the theory of Lianheng

Bribery various countries and then defeat them one by one, allowing Qin to unify the world.

After Yang Yun and Zhang Heng were recruited as disciples by Guiguzi, they also fought against each other for thousands of years. In the end, they were evenly matched and neither could kill the other, so there were two northern ghost emperors coexisting.

This time, Gui Guzi came out again and spread the news a year in advance, hoping to recruit two new disciples, thus attracting many ghost immortals and ghost kings from all over the netherworld.

When Lu Shanguan and Dong Xiaowan came here, they couldn't find a place to stay in Heizao City, so they could only take out their own magic weapons to block the dark wind.

They brought the porcelain Weiyang Palace and the wooden ritual vessels "Yihe Palace" and "Linglong Pavilion".

The night passed and the next morning.

Before dawn, Lu Shangguan took away the "Linglong Pavilion" and came to the city to have breakfast.

As ghost kings, they do not need to eat originally, and the food in the underworld is different from that in the human world. It can only replenish energy and has no color, fragrance or flavor.

While eating breakfast, Lu Shanguan learned more information.
Chapter completed!