北方的山货土特产经马帮和人力驮转至此，再经水路沿汉江运到汉口，江南的丝绸、稻米也经水路运来，而后从旱路翻越秦岭直抵长安。
B-Location I-Location O B-Thing I-Thing I-Thing I-Thing I-Thing O B-Person I-Person O O O O O O O O O O B-Thing I-Thing O B-Thing I-Thing O O B-Location I-Location O B-Location I-Location O B-Thing I-Thing O B-Thing I-Thing O O B-Thing I-Thing O O O O O O O O O O B-Location I-Location O O B-Location I-Location O