The plastic basket of fruit is a thing that can be seen everywhere in life, but can you think of someone who can rely on this humble thing to achieve millions of industry?

What is the use of the old plastic basket?

This man is Du Zhifang, an aquaculture farmer in Zhoushan City, Zhejiang Province.

May is a relatively busy time for aquaculture farmers, but this old Du is not only busy, but every morning he went to the fruit wholesale market to collect old plastic baskets!

What's more, this collection means buying tons of plastic baskets, and then paying a boat to transport these waste baskets to the island on the other side of the port!

Is it worth all this trouble?

Du Zhifang: It's worth it! I earned a million dollars last year on these old plastic baskets!

What the hell is going on here? B: Don't worry, this thing ah, we have to start with the old Du's crab!

Good crab is delicious but difficult to keep

This three-verruca crab is a kind of seafood rich in the waters near Zhoushan Islands. Its meat is full and delicious, and it is loved by the local people.

With the decline of Marine resources, the number of wild swimming crabs has gradually decreased, so Zhoushan people eat the sea by the sea, they played the idea of artificial breeding swimming crabs.

Can be this breed, but found difficult than & ldquo; Ascend & rdquo; !

Zhoushan city now has a total of more than 20,000 mu of breeding ponds, can put 200 million crab seedlings every year!

The average survival rate is only about 2%!

Don't look at the portulas wearing thick armor, as if they are not afraid of the world, but when it is time to moult, they immediately become a soft persimmon who sees who is bullying!

This is undoubtedly a disaster for the swimming crab!

And this kind of disaster, it will experience sixteen times in its life!

Most of the swimming crabs die in the process, and only a lucky few survive.

And the "killer" who does them the most harm in this disaster is themselves!

The swimming crabs kill each other very badly.

Because the time of moulting of each crab is not consistent, when some of the crabs start to moult, others will take the opportunity to eat them, and when they start to moult, they will be eaten by another group of crabs.

This internecine cannibalism goes on again and again, and only the lucky few who hide very deep can survive by chance.

The old plastic basket hid the crab

The old audience who often watch our program may say: The crab moults its shell, easy to solve, I have seen it in the program before! Plant some water grass is good!

It's true that for mitten crabs and other mitten crabs, all you have to do is plant water weeds to give them shelter. The problem is, you can't grow grass in seawater! But how can you do that?

That's when the old plastic baskets Du bought came in handy!

After experiments, the researchers found that when the crab wants to moult its shell, it will burrow into the basket by itself, and after a few hours, when the shell has hardened, it will come out again, and everyone will take turns to live in it, and the occupancy rate can reach 80 or 90 percent!

Using these old plastic baskets, the researchers increased the average yield per mu by about five times.

And Lao Du is relying on this trick to successfully raise swimming crabs, to achieve millions of annual output value!

The reporter also found a strange thing when interviewing Lao Du. The old plastic baskets he bought with so much effort had to be sawed in half before being put into the water. Why? And the empty door of the sawn plastic basket is wide open, will not let the crabs that have not moulted their shells come in?

According to Du, this is a crucial step, not only will it not cause the crabs in the basket to be attacked, but it can save their lives! Want to know why?

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