原标题：山西大同古城内所有区域均被划定为地下文物保护区据央视新闻消息，总台记者今天（13日）从山西大同市平城区人民政府了解到，为加强地方文物保护工作，根据《中华人民共和国文物保护法》《山西省实施〈中华人民共和国文物保护法〉办法》等法律法规的相关规定，大同古城内以城墙为界，东至和阳门、南至永泰门、西至清远门、北至武定门，古城内所有区域均划定为地下文物保护区。    (ECNS) -- Extreme weather contributed to a month-on-month decline in online registrations of second-hand home sales in Guangzhou, Guangdong Province, in July, according to the local real estate agents association.    Central urban districts recorded moderate growth, while transactions generally declined in outlying areas.    The city registered 8,658 second-hand home transactions in July, covering a total floor area of 858,500 square meters. The number of transactions fell 0.94% month on month and 7.1% year on year, while the total area declined 3.42% and 7.23%, respectively.        Small and medium-sized homes accounted for a larger share of total transactions than in the previous month.    The share of homes measuring less than 60 square meters rose by 0.62 percentage points, while that of homes between 60 and 90 square meters increased by 0.29 percentage points.    Several of the city’s 10 most active property submarkets recorded month-on-month growth.    Transactions in the Fangcun Avenue area surged 47.93%, while the Sino-Singapore Guangzhou Knowledge City area posted an increase of 31.88%.    The association said that much of the housing demand accumulated in the first half of the year had already been released, while a wait-and-see mood was likely to prevail in Guangzhou’s second-hand housing market in August.    (By Helen Mo, intern Liu Shuangjing)                    。据了解，大同古城是在明代大同府城基础上全面修复的大同府城主城，包括古城墙、护城河、城内文物建筑、古民居及传统街巷，城墙内面积约3.5平方公里。

B | 大同古城内的文物古迹数量众多，现已对外开放的包括华严寺、善化寺、关帝庙、九龙壁等。

C | （总台记者 王曦 宋振兴）编辑 陈艳婷来源：央视新闻返回搜狐，查看更多责任编辑：