They each put away their wooden pieces, clinking their cups gently, and sealed away an enormous object by the small stove.

https://www.northwestflower.net/sha-po-lang/extras/autumn-festival

Although Master Feng Han had been friends with the fire machine and dogs all his life, being under two generations of unreliable emperors, his determination was repeatedly moulded and squeezed all his life, yet it did not spill a drop. When the country was nearly occupied, he had used his smelly and hard old bones to support the spirit of the Ling Shu Institute.

"It's a pity, bah," Gu Yun said, putting away his Black Eagle Armor, spitting out a mouthful of sand, and without any expression on his face, "There is no successor. This Ge Ban Xiao is not reliable enough, there's also that Cao Niangzi...Child, can you still walk? Or should I give you a piggyback ride?"

The young Ling Shu on the side was about to cry from fright, never daring to trouble the Marquis of Order, limping and shaking his head into a rotating fire wing.

In front of them was the vast grassland outside the pass, and behind them was a pile of burning broken iron one could not tell its shape anymore. The Marquis of Order took a look in the direction of the sun and waved his hand helplessly: "I am familiar with this place. Come with me. Didn’t return to the capital for a good drink, I just have to join in on the fun of you unfortunate children. How free I am"

This was a long story—

When the Mid Autumn Festival was approaching, General Gu, who was inspecting the border areas, was caught by the military affairs of the border defense for several days. When he was about to depart, it was already August 13th, and the steam railway in the west was still under construction. If he wanted to hurry back in time for the festival with Chang Geng, he had to fly back directly with the Black Eagle Armor.

Chang Geng was not willing to let him travel so far, he made the excuse that he had left the capital for inspection and especially sent a letter to tell Gu Yun not to rush back.

In recent years, the country was peaceful; with Gu Yun guarding all directions, naturally, there was no battle to fight. Therefore, all the blood in the Ling Shu Institute was invested in experimenting with this and that.

They created a combination of the Black Eagle and Giant Kite, its name had not been determined yet. They were still experimenting in the Northwest Frontier, which was sparsely populated. It looked like a wooden bird that Lin Yuan Pavilion used for communication. It had a big belly and was estimated to be able to carry more than twenty Black Armors.

When Marshal Gu heard that Ling Shu Institute was walking birds in the northwest, he curiously came to watch.