Hearing this crisp sound, Lin Xiao was stunned for a moment.

"Daddy, didn't you say that it's not so easy to practice back boxing? Why does the eldest brother only watch it once and make a sound? Lin Dong said weakly.

"Mu'er, you fight again and see." Lin Xiao didn't seem to hear Lin Dong's words, and said to Lin Mu with a serious face.

"Smack!"

Lin Mu punched his back again, and there was still a crisp sound.

"Good! Good! Good! Lin Xiao said hello three times in a row, his expression was very excited, and his eyes shining when he looked at Lin Mu.

Lin Mu can understand Lin Xiao's excitement, like him, who can learn to pass the back fist just by watching it once, is definitely a genius in the sky, Lin Xiao only got started after learning it for a week.

In fact, Lin Mu was still clumsy, after upgrading from the system to the entry, if he used his full strength, he could hit three rings of back punches, but that was too shocking, so he only played one.

"Big brother is amazing!" Lin Dong was also very excited.

"Second brother, your talent is also very good, as long as you practice a few more times, you can still make a sound." Lin Mu said.

"Talent is good on the one hand, but diligence is also important, and for cultivation, you must not carry it." Lin Xiao said with a serious face.

"Remember, child!" Lin Mu and Lin Dong said in unison.

A day slipped away in the non-stop cultivation of the two, Lin Mu was only in contact with martial arts for the first time, and he was a little curious, so he practiced seriously for a day, and he had a system, so he didn't need to practice so hard at all.

In the evening, Lin Xiao said, "That's all for today's cultivation." ”

Lin Xiao is also very satisfied with the efforts of the two.

"Daddy, go back first, I'll be practicing for a while." Lin Dong said.

"I'm with my second brother." Lin Mu also said.

Lin Xiao instructed, did not stop him, and went back alone, today is the best day in his mood in the past few years, Lin Mu and Lin Dong's cultivation qualifications are very good.

"Smack!"

Lin Dong punched his back again, and successfully made a sound.

"It really doesn't seem that hard!" Lin Dong said.

It was recorded that Lin Mu and Lin Dong practiced for almost an hour, and the sun had already sunk into the mountain.

"Big brother, there is still some time, let's go there to bubble." Lin Dong proposed.

Lin Mu knew that Lin Dong was talking about that cave, and that place was only known to them and Qingtan.

"Hmm." Lin Mu nodded, he stayed just to see the stone talisman, but he had the system, and he didn't need to rob Lin Dong of the opportunity, but for this second divine object in heaven and earth, he still wanted to see it.

The two of them ran deep into the back mountain, and after about ten minutes, a steep cliff appeared in front of the two of them, and they jumped down some protruding rocks from the cliff, which were inconspicuous, but they just formed a dark path.

Both of them were familiar with the road, so if they were careful, there were no accidents, and the latter cave hidden under several boulders appeared in front of them.

The cave is extremely hidden, and the surrounding boulders are hidden by it, unless you deliberately search for it, you can't detect it at all, and of course, under normal circumstances, no one will do such a thing.

Jumping into the cave, a cool breeze hits your face, which is in stark contrast to the heat outside, and it is a good place to escape the heat.

The inside of the cave is not extremely spacious, and there is nothing special except for a stone pond in the center of the cave.

"The stone rune should be on top of this." Lin Mu glanced at the top of the pool.

"Poof!"

Lin Dong took off his shirt, left a pair of pants, jumped into the pool, and then shouted at Lin Mu: "Big brother, come down quickly!" ”

Lin Mu also wanted to try the effect of this stone rune spiritual liquid, and there was another stinky sweat on his body, so it was okay to go down and soak it, so he took off his clothes and jumped down.

Tick!

On Lin Dong's blood-stained arm, a drop of blood fell into the pool, and suddenly the pool water seemed to be boiling, and blood-colored blisters rose from the surface of the water.

"Big brother, what's going on?" Lin Dong said in shock.

"Don't worry, it should be a good thing, haven't you noticed changes in your body?" Lin Mu said, those blood-red liquids were absorbed into the body, and the body was slowly strengthening.

"The scar on my arm is much lighter." Lin Dong said in shock, after Lin Mu's reminder, he also discovered the change in himself.

After about ten minutes, the water stopped boiling.

"Big brother, I'm about to break through the quenching quadruple!" Lin Dong said excitedly, he had just broken through the quenching triple not long ago, but he didn't expect to soak here, and he was about to break through again.

Lin Mu's strength has also been slightly enhanced, and the stone rune spirit liquid also has a great effect on the quenching quadruple.

"There's something weird about this pool!" Lin Mu said, and Lin Dong also nodded.

Lin Mu looked up at the top of the cave, and on it, he found a little light.

"Second brother, you go up and take that thing down." Lin Mu pointed to the top of the cave and said.

Lin Dong immediately went up and took down the stone talisman, which seemed to be a stone the size of two fingers, the stone was only the size of two fingers, with a faint gray color, but when the palm of his hand was pinched, there was a strange soft feeling, that kind of touch, it should not be stone, but it was not like jade, let alone wood.

"Big brother, what is this?" Lin Dong asked.

"It should be the source of this pool's weirdness." Lin Mu said, and didn't explain too much to Lin Dong.

"Big brother, you found it, so I'll give it to you." Lin Dong said.

"Second brother, I'll give it to you, but don't let others know, the effect of this pool of water is no less than the third-grade elixir, if you let others know, it will bring great disasters to the Lin family." Lin Mu reminded.

He has a system, and the stone runes are not very useful to him.

"Hmm." Lin Dong nodded solemnly, although he was not very old, he still understood the truth that the husband was innocent and guilty, and put away the stone talisman closely.

"Brother Lin Mu, Brother Lin Dong." At this time, there was a crisp sound like the cry of a yellow bird at the mouth of the cave, and then a young girl appeared in front of the two of them, it was Qingtan.

"Hehe, I knew you were here." Qingtan smiled proudly.

Qingtan is a little girl of about thirteen or fourteen years old, she is only wearing a simple set of light-colored clothes, but the simple clothes can't hide the agility on the little face, although she is still young, but a small face is quite delicate, and when the big eyes flicker, it looks extremely cute.

"Brother Lin Mu, Brother Lin Dong, my mother asked me to call you to dinner." Qingtan said.

"Qingtan, let's go!" Lin Mu smiled and touched Qingtan's head.

"Brother Lin Mu, don't touch my head, mess up my hair." Qing Tan pouted.

"Qingtan has grown up now, and she knows that she loves beauty, and she is no longer the slug who followed me all day long." Lin Mu said with a smile.

"Brother Stinky Lin, you know how to bully me." Qingtan was a little embarrassed by what Lin Mu said, walking in front alone, her appearance made Lin Mu and Lin Dong laugh.

The three of them happily returned home.