Corpses in Corpse Looting are of different grades. The highest-grade corpses are those of players, where the system evaluates the value of the deceased player's belongings and then arranges them in order of value. In theory, corpses refresh every minute, allowing players to loot corpses three times, but in practice, it's impossible to achieve that. Without any skill enhancement, each looting takes 20 seconds.
The 20-second rule applies only to players, set specifically to protect the legacy of deceased players. When looting zombies and NPCs, what's considered is overall attributes. Looting can take up to 20 seconds at most, but the higher your attributes, the quicker the looting. Intelligence has the greatest impact.
Lin Wu, a seasoned thief, was well versed in the art of Corpse Looting. Thus, before he killed his target, he had already placed one hand on Lin. The moment Lin died, Lin Wu instantly initiated Corpse Looting, determined to loot three times.