Zhang Ke's presence cast a pallor of anxiety over Su Man and Lu Yuwen. It was as if they were perennially on edge, unable to relax.
They set out once again to locate the arrowhead, and this time, per Lu Yuwen's suggestion, Su Man intentionally chose a spot deeper under the water.
Zhang Ke returned to the boat for a break and asked Su Man where the next arrowhead was to be tied. Su Man pointed it out to him.
"From here, go down about three or four meters..."
"Is it three meters or four?" Zhang Ke challenged with a raised eyebrow, evidently dissatisfied. "Did you leave your brain on the boat when you dove?"
Without missing a beat, Su Man fired back: "I did bring my brain with me! But not a ruler! How am I supposed to measure under the water? Or did you expect me to provide you an exact measurement to the centimeter?"
Zhang Ke retorted, "You're so fucking stupid. Can't you see where the rope is wet on your body? Isn't that a clear indication of how deep you dived?"