List of violations in the construction industry: three treasures, four openings, and five edge areas

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1. Workers at the construction site entered the site without wearing safety helmets. 2. The way in which safety helmets were worn did not meet the requirements. 3. The exterior of the construction site was not covered with protective mesh screens. 4. The specifications and material of the protective mesh screens did not meet the requirements. 5. Safety protection facilities were not standardized or designed as proper tools. 6. No safety protection facilities were installed at the stairways. 7. No safety protection facilities were installed at the elevator shafts. 8. Proper protection was not installed inside the elevator shafts as required. 9. No safety protection was provided for the pre-existing openings. 10. No protective shelters were erected at the passageways. 11. The construction of these protective shelters did not meet the requirements. 12. There was no protection at the edges of the balconies. 13. There was no protection at the edges of the roof