1. Caving

2013-02: Spring Festival Expedition / San Wang Dong (public)

Hong Meigui's Spring Festival Expedition 2013 went into San Wang Dong, establishing an underground camp next to Da Luo Dang Tiankeng, and pushing leads in various directions.
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    Mining hearth / pit.
    A wooden ladder used by (nitrate?) miners in the cave.
    Ladder rungs clamped to the rock and held in place with a vertical log.