At the first greenhouse we were welcomed by the owner.
The structures are simple but very efficient.
Each greenhouse can produce 150 tonnes of tomatoes.
The earthen walls store heat which is released at night when temperatures drop.
There are 560 structures on this site alone.
Each greenhouse has a watering system.
We visited several greenhouses at this site.
The straw mats on the roof can be rolled down at night to keep the warmth in.
Straw mats for doors keep the heat in.
The owner explains about the greenhouses.
The tomatoes in this greenhouse will be ready in time for the Chinese New Year celebrations.
The plants are watered by an irrigation system with special drip system.
The yellow plastic square attracts the insects and traps them on its sticky surface.
This is where the water feeds into the rows.
Mr Chris Han and some of the other visitors.
We were invited to one of the delegation's home for lunch.
Delicious Chinese food.
A view of a few of the greenhouses in Youg Qing. There are 1000 on this site.
At this site they grew cucumbers.
It takes 7 months for the cucumbers to reach maturity.
One of the workers shows us the greenhouse.
The yield from one greenhouse is around 20 tonnes.
A view of the back wall of the greenhouse.
Where the back wall meets the roof plastic roof.
The cucumbers grown here are very prickly.
The rows in the greenhouse are close together.
Some of the villagers who work in the greenhouses.
New mats for the roof.