An Unexpected Place, Shangbala Town

Smack!

Richard followed Bobobo Wei Qi back to the surface, his feet landing on the ground with a soft sound.

Watching Bobobo Wei Qi leave, Richard shook his head before walking into the stone building of Blue Lake Manor and entering its study.

After entering the study, Richard sat down at the desk, took out a Goose Feather Quill, ink, and a scroll, and began writing.

Although his earlier exchange of combat techniques with Bobobo Wei Qi had been brief, he had still gathered quite a bit of information.

For example...

"Scratch, scratch, scratch..."

"A casting range of ten thousand meters could indeed effectively avoid the enemy's visual detection during the day. However, considering that the battle had taken place in the late afternoon, close to dusk, when the light had not been fully sufficient and some clouds had blocked the sky, a casting range of ten thousand meters could not be regarded as an absolutely safe value.

"If the combat environment was extremely unfavorable—for instance, at noon under a clear, cloudless sky—the casting range would need to be increased.

"Generally speaking, due to the limits of physiological structure, the human eye has a clear vision distance of twenty-five centimeters. A person with normal eyesight can achieve a resolution between one two-thousandth and one five-thousandth, meaning they can distinguish an object one meter in size from two thousand meters away.

"Through certain spells, Wizards can improve their eyesight to some extent. On the premise of reasonable enhancement, expanding the casting range to twenty thousand meters would be more appropriate—that is, twenty kilometers.

"On Earth, the average distance at which fighter pilots visually spotted enemy aircraft in aerial combat was eight thousand meters. Twenty kilometers already counted as beyond-visual-range combat in the strict sense. This was also one of the important