Orientation: north-south is best; east-west acceptable; avoid diagonal direction. Specifications: width 4-6m, length 30-50m, height 1.6-2m. When building greenhouse clusters, maintain 1.2-1.5m spacing between greenhouses and 4-5m between heads for transportation and ventilation. Stake layout: choose open, non-windy locations. Use Pythagorean theorem to ensure right angles at four corners. Select new green bamboo poles, 2-2.5cm diameter, 3.5-4.5m length. Insert bamboo into holes 70-80cm apart along positioning lines, fill and compact soil. Bind 3 longitudinal support bars at arch top and 60-80cm height on both sides.