But it was basically used in bait pits, which were deliberately set traps specifically for catching water monkeys.
However, this also indicated that a main pit might exist nearby, though it was unknown what exactly was buried inside.
Li Zhiyuan had no interest in searching, because the condition needed to set up a ground trap was likely the "live burial" from back then. It did not refer to burying people alive, but rather underwater structures that could move with changing hydrology.
Therefore, perhaps when it was constructed, the bait pits and main pit were in standard positions. But now, it was uncertain how chaotic they had become. Even if you knew the location of a bait pit, you could not deduce the main pit's position.
Si Hai's family was unlucky, and it was unclear whether his fish pond was dug right on top of a bait pit, or the bait pit itself had moved beneath his fish pond.
