Moonless Sky

Su Yun transmigrated and became a live streamer. Suffering from no talent, he practiced all kinds of skills live every day in order to make a living.
Such as flying cards slicing flies; wooden swords playing table tennis; flying needles shooting bulletproof glass; long jump landing on water without sinking...
On the first day, Su Yun learned flying cards, and people thought he was here to be funny.
On the fifth day, Su Yun's flying cards split the cucumber, and the people thought that was the best he could do.
On the thirtieth day, Su Yun's cards cut through the stake from ten meters away and beheaded the fly... The crowd was shocked and then agreed that it was a special effect!
...
Sometime later, when Su Yun was accidentally exposed and received a summons to file, more of his skills were revealed one by one: 
The flying skills that enabled him to cross the river!
The sword art of splitting rocks with one sword!
Flying needles that were comparable to the penetrating power of a bullet...
Police: Are you sure this is just a live streamer? Immediately file for an s-level case!

The Police Called Me For The Filing, Revealing Me, A Master

Su Yun deliberately lied to mislead him, but it did not affect the consultation.

Professor Lü said, "As for metal, it depends on the material. For example, gold and silver might destroy the original patterns. After repair, there will be subtle flaws. If it's an item with a pattern, I'm afraid it will be more complicated."

Hearing that it would destroy the original picture, Su Yun immediately felt that the difficulty of repairing it was too great. Most importantly, he did not know what material the Warring States gold foil was made of.

"Professor Lü, I don't know what material it is, but there is indeed a pattern on it. I wonder if it can be restored."

Professor Lü's ancient eyes moved as if he was thinking. Then, he slowly said, "I wonder if you have a photo of the complete pattern from before?"

Su Yun thought to himself, Of course I have it, but I can't show it to you. What if it's exposed?

Could It Be... Flying Cards?!