The WENLUO greenhouses produced by Qingzhou Changrong Greenhouse Engineering Co., Ltd. use a frame made of steel and aluminum alloy, and the transparent covering material is 4mm thick flat glass. The greenhouse roof shapes and types are mainly the multi-ridge connected type and the single-ridge connected type.

The standard ridge span of the connected WENLUO type greenhouse is 3.2 m or 4 m, and the span of a single greenhouse is 6.4 m, 8 m, or 9.6 m, with large spans reaching 12 m and 12.8 m. The early greenhouse column spacing was 3–3.12 m, but currently 4–4.5 m is more commonly used. The traditional roof ventilation windows of this type of greenhouse are 0.73 m wide and 1.65 m long; at present, the glass width is about 1 m, commonly 1.25 m. Taking a 4 m ridge span as an example, the length of the ventilation window glass is 2.08–2.14 m. Similarly, over time, the height of the drainage gutter has also been gradually adjusted. Currently, the column height of this type of greenhouse is 2.5–4.3 m, the ridge height is 3.5–4.95 m, and the glass roof angle is 25°. The standard span of a single-ridge connected greenhouse is 6.4 m, 8 m, 9.6 m, and 12.8 m. With the same indoor height and span, single-ridge connected greenhouses have a higher window ventilation rate compared to multi-ridge connected greenhouses.