Core Points - The incident involved the falling of roof tiles from the Ming Zhongdu Drum Tower in Fengyang County, Anhui, with no reported injuries [1][2] - An investigation has been initiated by local authorities, focusing on the design, construction, and supervision of the repair project [1][2] Summary by Sections Incident Details - The roof tiles began to slide down from near the ridge of the roof, causing dust and debris to fall onto the base and surrounding area [2] - The incident occurred during dinner time when the site was closed to visitors, minimizing potential injuries [2] Historical Context - The existing structure of the Ming Zhongdu Drum Tower was built in 1995, while the base was designated as a key cultural heritage site in 1989 [1][2] - Previous repairs had been initiated in February 2023 due to safety concerns, with completion expected by March 2024 [2] Repair and Maintenance Issues - Cracks were detected in December 2022, but subsequent inspections deemed the structure stable, leading to repairs based on that assessment [4] - Experts suggest that the use of SBS rubber-modified asphalt for waterproofing may have contributed to the sliding of tiles, as traditional methods were not employed [4][5] Structural Classification - The local cultural authority clarified that the tower itself is not classified as a cultural relic, which may affect the standards applied during repairs [5] - Recommendations for better materials and construction practices were made to prevent future incidents [5] Environmental Factors - Recent weather conditions, including significant temperature fluctuations, were noted, but rainfall was minimal leading up to the incident [5]