Fortunately, it didn't take long. At 2:40, an eight-seater van slowly drove up and stopped in front of everyone. Professor Yu got out first, followed by his four students, and finally two strong young men.
While Professor Yu was exchanging pleasantries with his second grandfather, the two young men took two large packages off the car and began to put on various equipment.
As they donned their inflatable suits, breathing masks, oxygen tanks, and other gear, and then watched the two pull out a pair of flippers from their bags, Xu An sensed something was amiss. This equipment, this attire—why did it look like they were going into the sea? Could the problem be at sea, or on the mudflats?
After the two young men were fully dressed, Professor Yu and his team changed into vests, rubber pants, and rubber shoes, and led everyone down into the mudflats.
A group of forty or fifty people were walking together on the mudflats, including two strangely dressed frogmen. The fishermen who had been secretly observing the situation just moments before stopped pretending and quickly joined them to watch the spectacle.
The asphalt road was located in the middle of the mudflats. After descending into the mudflats, they walked for a full two kilometers in the sparsely vegetated and rarely visited direction to the left before stopping. At this moment, Professor Yu suddenly turned to look at Xu An and asked, "Do you sense anything is wrong?"
Like a student who was daydreaming in class and was suddenly called on by the teacher to answer a question, Xu An was stunned for a moment before he used his five senses to observe what was special about this mudflat.
Firstly, plants are scarce, and even those that are present are extremely malnourished; secondly, marine life is also scarce, and even the small crabs that are usually seen everywhere don't crawl this way; but apart from these two places, there doesn't seem to be anything wrong!
But seeing the serious expression on Professor Yu's face, Xu An thought for a moment, then bent down and plunged his hand into the mud. The moment his skin touched the mud, Xu An's eyes widened in shock.
Normally, while the surface mud may become scorching hot under the sun, the mud five centimeters or at most ten centimeters below the surface should feel cool.
Having walked along the path without noticing the temperature due to the thick rubber clothing and rain boots, Xu An now felt that not only was the mud ten centimeters deep hot, but it was also hot fifteen or twenty centimeters deep! And it got hotter the deeper you went!
Xu An suddenly looked up at Professor Yu, who had a slight smile on his lips, and exclaimed in astonishment, "Professor Yu, why is this mudflat all hot!"
Upon hearing Xu An's words, everyone was stunned for a moment. After realizing what he meant, they didn't hesitate to imitate Xu An, digging their hands into the mud. The warm, moist sensation enveloped their entire arms...
Professor Yu didn't answer Xu An's question. He turned and nodded to the two frogmen, who then walked straight towards the sea. When the water reached their chests, they fastened their breathing masks, bit their oxygen tubes, and dove into the sea...
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