C810 Ambushing point-pointing mystery

"Speaking of sneak attacks, the most important thing is that the timing is the most critical. If we go early and the enemy still has some energy left, we are courting death. If we go late and the enemy has formed a team to defend, then there is no use but striking the grass to alert the snake. But it's my first time fighting against a monk on a battlefield, so I don't know what they're doing