This is a fairly ordinary and typical Northeast fire kang, and the specific year is impossible for two people to judge.

Even Lin Congfeng has no way to estimate without the corresponding knowledge reserves.

Of course, this is not too important.

The kang plate is very simple, basically only using stones and yellow clay.

The kang walls are all made of large bluestone that looks very strong, and the gaps between the stones are filled with yellow mud.

The actual effect of this very simple configuration is very strong, and it is definitely not something that the sapper shovel in Lin Congfeng's hand can destroy.

And even if they could, the physical strength of the two children was also a problem.

Therefore, Lin Congfeng can only put the breakthrough point on the kang noodles, which will be relatively easy to handle.

The average kang noodles are probably just stone slabs, and they are only three or four inches thick at most.

However, after Lin Congfeng inspected the kang surface, he found that there was at least a layer of shell composed of a mixture of yellow mud and fine sand on top of the stone slab.

This shell has improved the sturdiness of the entire kang surface by more than a grade, which is really bad news.

Just when Lin Congfeng had a headache, Lin Jiu suddenly jumped on the kang, shouted "dodge", and then jumped up, stepping heavily on the kang with both feet.

Lin Jiu didn't bother to slowly study how to open the kang noodles, this kind of simple destruction was what he liked and was good at.

Since there was no sign at all, Lin Congfeng didn't have time to stop it, so he could only watch Lin Jiu mess around.

He was so depressed that he wanted to die in his heart, and Lin Congfeng wanted to open the kang noodles carefully not because he had more time, nor because he was unwilling to save effort.

It's that Lin Congfeng is afraid of destroying the clues or the way out in the kang.

If there were any small objects in it that could be called clues, then the two of them would have to slowly pick through the rubble.

And if there is a passage below, then it will be even worse, and the two of them can only get out by cleaning it up little by little.

But it was too late to stop it, and Lin Congfeng could only be forced to accept the time-consuming and laborious restorative work that would be required later.

However, when Lin Jiu's feet fell heavily, the kang surface did not collapse, but Lin Jiu's legs were numb.

This phenomenon is very abnormal, although Lin Jiu is only a child, the physical indicators of the Lin family are much higher than ordinary people of the same age.

This is not only because of the pedigree, but also because of the acquired development and cultivation.

According to Lin Jiu's posture just now, the energy brought by kinetic energy and potential energy is enough to crush this layer of kang surface, even if it can't be completely broken, it is a sure thing to let the kang surface break.

Now there is only one possibility for this situation to occur, and that is that there is something under this kang surface, and this kang is not hollow.

Only in this way can we resist Lin Jiu's step.

Lin Congfeng was overjoyed when he found this, and hurriedly beckoned Lin Jiu to dismantle the kang noodles.

"Wait a minute, my legs are too numb, let me slow down for a while."

“………………”

Except for a folded sapper shovel on Lin Congfeng's body, there is really nothing that can be called a tool.

And Lin Jiu didn't even have a single chopstick on his body, except for the compressed biscuits that he had hidden.

There was no way, Lin Congfeng could only give the dagger to Lin Jiu as a tool, it was simply a tyrannical thing.

The shell, which was made of yellow mud and fine sand, was unusually strong, and the wisdom of the working people was simply endless.

The two of them ping-pong for a while before they smashed a pitiful little hole.