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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Tian Ping Miao Tiankeng does not actually meet the definition of a tiankeng - it's diameter is way too small.
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