The study looked at different types of solar greenhouses in Shanxi Province and identified issues with their design. They focused on the structure of the lighting roof, wall style, and digging depth. The researchers found that there are two main types of solar greenhouses based on the lighting roof design: stand slope and arch round. They also noted problems with shading, excessive digging, and thick walls in existing greenhouses. The study suggests developing a standardized construction plan tailored to Shanxi's climate to improve new and existing solar greenhouses.