点人溯事 · 历史人物生平行迹专题（第 33 / 58 篇）
洪大容燕行与乾净衕笔谈行迹（1731年 — 1783年 · 朝鲜英祖七年至英祖五十九年）
Hong Daeyong's Embassy and the Qianjing Hutong Dialogues (1731 CE – 1783 CE · Joseon Korea under King Yeongjo)
时代跨度：1731年 — 1783年 · 朝鲜英祖七年至英祖五十九年
途经站点：共 8 站
起点 → 终点：汉阳 → 汉阳
全线途经古今地名：汉阳（今韩国首尔） → 义州（今朝鲜新义州一带） → 凤凰城（今辽宁凤城） → 盛京（今辽宁沈阳） → 山海关（今河北秦皇岛山海关） → 北京琉璃厂（今北京） → 北京乾净衕（今北京） → 汉阳（今韩国首尔）。
Route Stops: Hanyang (Seoul, South Korea) → Uiju (near Sinuiju, North Korea) → Fenghuang Cheng (Fengcheng, Liaoning) → Shengjing (Mukden) (Shenyang, Liaoning) → Shanhai Pass (Shanhaiguan, Qinhuangdao, Hebei) → Liulichang, Beijing (Beijing) → Qianjing Hutong, Beijing (Beijing) → Hanyang (Seoul, South Korea).
洪大容燕行与乾净衕笔谈行迹 · 逐站时空坐标、古今地名与史料诗词详解（8 站）
生于汉阳两班之家，号湛轩；通晓律历算数，自铸浑天仪究心天文，为中朝士人交游之先声者。
Born to a Seoul yangban family, Hong was a mathematician and astronomer who built his own armillary sphere before he ever saw China.
以随员身份随朝鲜冬至使行渡江入清，时年三十五；使团取道辽东驿路南下入关。
At thirty-five Hong crossed the Yalu in winter with the Joseon embassy, taking the old post road into China.
过栅门入凤凰城，沿途细察清人市肆与满汉风俗，笔之于册。
Passing the palisade gate into Fenghuang Cheng, Hong noted markets and Manchu-Han ways on the road south.
使行在清朝陪都盛京小驻，观城郭宫殿，与商贾笔谈交易之利。
The embassy paused at the Qing secondary capital, where Hong studied the walls, palaces and trade of Mukden.
经天下第一关山海关入关内，直趋燕京。
Through the First Pass Under Heaven the embassy entered China proper and pressed on to the capital.
抵北京后遍游琉璃厂购书购仪器，访天主堂观西洋仪器，与钦天监中人论历算。
In Beijing Hong haunted the bookshops of Liulichang, inspected Western instruments at the Catholic church, and talked astronomy with the imperial astronomers.
与进京会试的杭州举子严诚、潘庭筠、陆飞在乾净衕寓所连日笔谈，论学论政至夜分，洒泪而别；归国后编《乾净衕会友录》，笔谈录在汉城士林间秘密传阅。
With three Hangzhou candidates met in Beijing, Hong talked by brush and ink through the nights — a friendship across two literatures that his countrymen read in secret for years after.
朴趾源《会友录序》（为洪大容笔谈录作）：“吾岂不知中国之非古之诸夏也……制度虽变而道义不殊。”Bak Ji-won, preface to the record of these dialogues: "Do I not know that China is no longer the China of old? ... The institutions have changed, but principle and duty are not different."
使行循原路东归；此后与严诚等书札往还不断，闻严诚病逝恸甚；著《医山问答》倡实事求是，为北学派开山。
Home again, Hong kept up the correspondence until Yan Cheng's early death; his dialogues and writings opened the pragmatic "Northern Learning" school.
洪大容《与孙蓉洲书》：“天下一家，四海兄弟。义有可据，迹无可嫌。”Hong Daeyong, in a letter to a Chinese friend: "All under heaven one family, the four seas brothers — where righteousness holds, distance is nothing."