Hong Meigui Yunnan 2004
This was a continuation of a programme of cave exploration in Yunnan Province already supported in 2002 and 2003 (MEF Refs 02/48 & 03/49) and an unsupported expedition earlier in 2004. On this trip, the team attempted to find entrances at over 4000m that might connect with resurgences in the Yangtze Valley 2,000m lower down. The hope was that they might find a system deeper than the current world record of 1,800m. They covered a large area and logged 240 new entrances at heights up to 4,400m but were unable to achieve any significant depths.