Second, it is difficult to salvage. The wellhead of the Forbidden City is relatively small, and professional tools are needed to salvage the things at the bottom of the well. With the technology at that time, it was impossible to have professional salvage equipment, so it was very difficult to salvage the jewels at the bottom of the well. At that time, the simplest way was to dismantle it, but if it was dismantled, it would definitely destroy the ancient well and possibly cause other accidents, so people at that time could do nothing even if they wanted to salvage jewelry.
Whether there are jewels in the deep wells of the Forbidden City should be inferred from two famous events in modern China. One is Eight-Nation Alliance's war of aggression against China. Empress Dowager Cixi fled to the west and put a lot of wealth in deep wells. Eight-Nation Alliance should also guess that Empress Dowager Cixi will send someone to salvage them when she returns to the palace. Another thing is that after the Revolution of 1911, many ladies-in-waiting and eunuchs stole the cultural relics of the Forbidden City, and some large items that were not easy to take away or cultural relics that were considered worthless were thrown into the well. These thrown things should be in a few, and later some cultural relics protection agencies also salvaged these cultural relics, which further reduced the possibility of treasure in deep wells.
How much are four? Everything in the Forbidden City is valuable and belongs to the government's public property. It cannot be traded in the market, and there is still the risk of being reported by the other party after the transaction. Even if these treasures are salvaged, they are still hot potatoes.