1. First, check whether the foundation under the indoor playground equipment is loose, subsidence, cracking and other unsafe signs; if there is a problem, you need to explain the specific location, number of defect types and reasons.

2. Check the important welding seams of iron parts, so that they cannot have defects such as missing welding, burn-through, cracks, serious undercuts, air holes and slag inclusions visible to the naked eye; focus on checking the tower structure, hanging structure, seat structure, etc. ; If there is a problem, you need to explain the specific location, number of defect types and reasons.
3. Check the connection of important parts, such as checking whether the bolts are loose, whether there are anti-loosening measures and signs, whether there are anti-falling measures for the pin connection, etc.; if there is a problem, it is necessary to explain the specific location, number of defect types and reasons.
4. Whether the wire rope is broken or damaged, whether the elastic parts are aging, whether the important structural iron parts are rusted, worn, deformed, etc., which affect the safety; if there are problems, the specific location, the number of defect types and the reasons should be explained.