The knowing old man hurriedly put away his ugly face, and turned around and walked back to the counter with his hands behind his back in a set of "I am a peerless master" walking posture.

Feng Bu saw that the old man's face changed so quickly, and the corners of his mouth twitched twice before he turned around and beckoned to Ning Yunrui and the others.

After Ning Yunrui sighed in disappointment, she still had the mentality of giving it a try, and dragged the very reluctant Ding Erhu into the attic.

Walking to the front and back of the counter with Feng Buyi, the old man unhurriedly took out a pen-cap-shaped object from the counter.

It is said to be cap-shaped, but it is not particularly like a pen cap, because it is so long that it can cover the entire index finger of most people.

On its outer side, there are three rows of dull round hedrons.

The number of them is exactly nine in a row.

Their colours are: deep red, emerald green and azure blue.

"Brother Ding, come first. After Feng Bu took the "pen cover" from the old man's hand, he handed it to Ning Yunrui as he spoke.

After Ning Yunrui took it, she didn't say anything, and handed it directly to Ding Erhu.

Seeing that Ning Yunrui handed the "pen cover" to others without appreciation, Feng Buyi smiled awkwardly and didn't say anything.

"What are you doing for me?" Ding Erhu, who reluctantly took the "pen cover", said with some complaints.

"Good ~ put your index finger in. Ning Yunrui, who was familiar with the road, pointed to the gap in the "pen cover" in Ding Erhu's hand, and said in an unquestionable tone.

Feng Buyi, who had already expected Ning Yunrui to know how to use it, didn't have any reaction, just watched all this calmly.

Seeing this, the old man couldn't help but look at Ning Yunrui twice with some surprise.

Ding Erhu was also obedient, he didn't even think about it and put his index finger into the "pen cover".

Suddenly, he felt the pain of his index finger being chopped into pulp.

But before he could scream in pain, he felt a headache that seemed to pierce his soul again.

Fortunately, the pain of these two kinds of foreign medicine only lasted less than half a breath, and to outsiders, he just turned pale.

Immediately afterwards, the round spar on the "pen cap" changed in order.

First of all, there was the dark red row of crystals, which lit up a full seven before they stopped changing.

Secondly, there is the row of emerald green hedrons, which only light up and then do not change.

As for the last row of azure hedrons, none of them lit up.

"Yes, the seven-star qualification of the training body! Seeing this, the old man first applauded, and then pretended to be a master and exclaimed.

"Congratulations, Erhu!" Ning Yunrui said happily patting Ding Erhu's back.

Although Ding Erhu hadn't understood what was going on, he still laughed heartily after receiving Ning Yunrui's congratulations.

"Brother Ding, it's your turn. When Feng Bu saw this, he curled the corners of his mouth with disdain, and then snatched the "pen cover" from Ding Erhu, who was smirking, and handed it to Ning Yunrui again as he spoke.

"This... Can I be unexpected?" Ning Yunrui, who knew that she had a few pounds and a few taels, didn't want to expose how wasteful she was, she didn't take the "pen cover", but asked a little weakly.

"Of course you can, as long as Brother Ding is willing to pay for the previous test. Feng Bu said with a wicked smile when he saw this.