Bird's nest is one of the traditional precious foods in China. We often call swallows nesting under the eaves domestic swallows. Their nests are made of grass or mud and saliva, which makes them inedible and has no nutritional value.

Natural cave swallows, also known as rock swallows, are really wild bird's nests, with little yield and rich minerals. People here can only collect a little each year in a deep mountain in Sichuan.

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The natural bird's nest is located on an extremely severe cliff and clings to a mineral-rich rock, so it is very dangerous to collect it.

Their picking tools are primitive and crude.

The picking journey is very long, and the climbing altitude is very high.

It takes several breaks to reach the cave, and it is freezing cold.

The picture shows the swallow cave nest. The wild swallow cave is very big, and people can easily get lost in it.

The cave is dark, so it is necessary to turn on the lights, and the river below is generally very deep and cold.

You should also wade through mountains and rivers, be careful, and get down before dark.

Injuries and landslides are common.