The layers of Xuanming Heavy Water press down upon Zhang Yu, causing every inch of his skin to resist the pressure from all directions.
Under this pressure, he has to not only mobilize muscular strength to resist the water pressure and protect his body's structure, but also use muscles to drive the airflow within the cavities of his body, maintaining the pressure difference inside and out, to prevent damage to fragile parts like eardrums, sinuses, and eyeballs.
Especially as the simulated depth of the Xuanming Heavy Water continues to decrease, the surrounding pressure becomes greater, Zhang Yu needs to consistently unleash even stronger physical power.
Yet at this simulated depth of -1300 meters, Zhang Yu's diaphragm, originally pushing the gas within his chest cavity, suddenly loses strength slightly, slowing his breathing by half a beat.
"Hmm?"
