1996年我到北京水利部挂职时，当时的一位领导得知我来自寿县，跟我说，寿县了不得，寿县有个古涵，跟古城墙、安丰塘，都是水利上“国保级”的遗存。
B-Time I-Time I-Time I-Time I-Time B-Person O B-Organization I-Organization I-Organization I-Organization I-Organization O O O O B-Time I-Time O B-Metric I-Metric B-Person I-Person O O B-Person O O B-Location B-Metric O O B-Person O O B-Location I-Location O O O O B-Location I-Location O O B-Thing I-Thing O O B-Thing I-Thing I-Thing O B-Thing I-Thing I-Thing O O O O O O O O O O O O O O O