00:00In the summer of 2026, the Ying River in Zhokou, central China, burst through its levees.
00:06117 meters of earthward gate dove, and flood water poured across the plains.
00:10Hundreds of workers and dozens of machines rushed into closing.
00:13But here's the part that surprises everyone, closing the first 100 meters was the easy part.
00:18The last 3 meters. That was the nightmare.
00:21Why? Think about what actually happens to the water.
00:25When the breach first opens, the gap is wide and the flow is spread out across its whole length.
00:30So engineers can work from both banks, throwing rocks and gravel into the water, slowly pushing it.
00:35Piece by piece, the gap narrows.
00:38But here's the catch. Water doesn't shrink into nothing.
00:42Take water away from one path, and it crowds into every path that's left.
00:46As the breach narrows, all that water, the entire flow that used to spread across 100 meters, gets squeezed into
00:51one single, narrowing throat.
00:53In hydraulic engineering, that last open gap has a name, the closure gap, the dragon's mouth.
00:59And the narrower that dragon's mouth gets, the faster and harder the water tears through it.
01:03It's like a stadium emptying out.
01:05When every exit is open, the crowd streams out common.
01:09But when only one door is left, everyone in the building lunges for the same open.
01:13The water doesn't multiply.
01:15The door simply disappears.
01:17What makes this truly dangerous isn't just speed, it's something called scour.
01:21Fast water doesn't just blow over the surface.
01:24It chews into the riverbed and into the freshly placed embankment.
01:27Drop a truckload of ordinary soil in there and it can be ripped away before it even settles.
01:32Worse, the water doesn't only attack from on top.
01:35It can tire underneath, hollowing out the base until the whole structure, no matter how heavy, collapses and slides away,
01:41tearing open the gap all over again.
01:43So closing the breach is not a matter of simply dumping rocks into a hole.
01:47Engineers have to read the depth of the water, the velocity of the flow, the condition of the riverbed, and
01:51the shape of the gap, then choose their method.
01:54Sometimes they build a working road from the banks, pushing machinery forward toward the dragon's mouth.
01:59Sometimes they seal the gap from the sides, gradually raising the underwater floor.
02:03Often, they combine both.
02:05And the material matters too.
02:07Big boulders are heavy enough to stand against the current and form a stable skeleton.
02:11But between those boulders are gaps, small channels that water sneaks through.
02:15So you need smaller rocks to fill the cracks, then fine material and anti-leak layers to seal it tight.
02:21It's like building a wall, big stones hold the shing, fine material blocks the gaps.
02:26Lose either, and the wall fails.
02:28So why not just dump a mountain of giant rocks and be done with it?
02:31Because heavy machinery can't simply drive into the middle of a flood.
02:35Workers must first build a stable platform from the bank, then inch forward.
02:39And even a boulder, dropped onto an unstable base, will be rolled away by the current before it can settle.
02:44The first hundred meters weren't just sealing the gap.
02:47They were building that road to the last stretch.
02:49At the very end, it becomes a race, a race between two speeds.
02:54How fast the workers can place material, and how fast the water can rip it away.
02:58If scour wins, every loji drop is swallowed.
03:01Only when the filling out paces the washing can they seize the moment and slam the dragon's mouth shut.
03:06But even then, it's not over.
03:08The new dam looks solid on the surface, but deep inside it's full of voids.
03:12Water can still seep through, grain by grain, carrying away fine particles and carving a hidden underground channel.
03:18That's called piping, and it can silently collapse a dam from within.
03:22So after closure comes reinforcement, sealing, anti-leak treatment, and constant monitoring to make sure the water stays on the
03:28right side of the wall.
03:29The final truckload of stone makes the gap vanish on camera.
03:33But the real fight, the one nobody films, is against the water you can't see.
03:37Closing a breach was never about the last few meters.
03:40It's about building, in the middle of the most violent water you'll ever face, a dam the current simply cannot
03:44wash away.
03:45That is what makes the last three meters the hardest three meters in the entire job.再也没起来。当天凌晨五点
03:55,三木户已断了气。江藤对所有人说
04:00,他们没有死。是谁让他们的灵魂进入假死状态。等灵魂进化好了
04:03,就会醒。遗体被放在一楼的房间里
04:08,继续等待复活。第三个目标,18岁的三木领慧。原因很简单
04:12,他曾经夸根本很帅。李慧被逼着正坐在地上
04:14,整晚不让睡觉。
04:14不让喝水,不让上厕所。江藤和根本去情侣酒店过夜
04:21,回来继续打。2月18日,李慧停止了呼吸。第四条命
04:29,李慧的母亲三木盒子被自己的亲生女儿们殴打致死。因为江藤说
04:33,你们的妈妈也有狐狸附身。第五条命和第六条命,1995年4月。
