cache is a 5ml red magnetic tube behind an iron. see spoiler
东不压桥的前世今生
东不压桥曾是北京城重要的水利地标，位于地安门东大街以北，是什刹海水系进入皇城的必经之路，御河的起点。如今，这座桥已不复存在，但其名称和历史故事却留存在东不压桥胡同之中。
一、桥梁概况与历史变迁
东不压桥是一座东西走向的单孔石拱桥，始建于元朝，与地安门大街略偏南的街心相交。它的具体参数为：拱高6.85米，桥长28.8米，宽7.95米。有趣的是，在地安门西大街也有座同名同功的石桥，人们便称其为“西不压桥”，从而区分二者。
历史上，该桥见证了皇城墙的变迁。明清时期，皇城墙曾跨越桥身，使桥身显得“被压”。到了民国初年，随着皇城的拆除，东不压桥也一并拆除，这或许是其名称“不压”的由来——象征着“如释重负”。
二、名称的演变与考证
东不压桥的名称并非一成不变。
三、水系与胡同的关联
东不压桥曾是玉河的河道。20世纪50年代，河道改为暗管，成为了今天的东不压桥胡同。该胡同与桥南的东吉祥胡同，都曾是玉河的水道。
此外，与东不压桥相关的还有东板桥胡同。从东不压桥胡同穿过地安门东大街即可到达。这条胡同因一座南北走向的木板桥而得名，是御河进入皇城后的第一座桥。河水由此向东流经北河胡同，最终在水簸箕胡同地势低洼处汇集。这些胡同的名字，都生动地记录了昔日水系的流向和地貌特征。
The Past and Present of Dongbuya Bridge
Dongbuya Bridge was once an important hydraulic landmark in Beijing. Located north of Di'anmen East Street, it served as the essential passage for the Shichahai water system to enter the Imperial City and was the starting point of the Yuhe River. Although the bridge no longer exists, its name and historical significance are preserved in Dongbuya Bridge Hutong.
I. Bridge Overview and Historical Changes
Dongbuya Bridge was a single-arch stone bridge running east to west, intersecting with Di'anmen Street slightly to the south of its center. It measured 6.85 meters in arch height, 28.8 meters in length, and 7.95 meters in width. Interestingly, a similar bridge with the same name and function existed east of Beihai’s back gate on Di'anmen West Street, leading people to distinguish them as the "East" and "West" Buya Bridges.
Historically, the bridge witnessed the evolution of the Imperial City wall. During the Ming and Qing dynasties, the wall crossed over the bridge, making it seem "pressed." In the early years of the Republic of China, with the demolition of the Imperial City, Dongbuya Bridge was also removed. This event might be the origin of its name, "Buya," which translates to "not pressed," symbolizing a sense of relief.
II. The Evolution and Study of Its Name
The name of Dongbuya Bridge has changed over time.
-
Yuan Dynasty: It was initially called "Dong Buliang Bridge."
-
Ming Dynasty: The mid-Ming dynasty record Jingshi Wucheng Fangxiang Hutong Ji referred to it as "Buliang Bridge." However, some scholars suggest its original meaning was "Buliang Bridge," implying that half of the bridge was occupied by the Imperial City wall, making it so narrow that its width could be measured in steps.
-
Later Colloquial Name: In contrast to the "West Ya Bridge" (originally called West Buliang Bridge) to its west, it gradually became known colloquially as "Dongbuya Bridge."
III. The Connection Between the Water System and the Hutongs
Dongbuya Bridge once spanned the Yuhe River. In the 1950s, the waterway was replaced with a culvert, becoming today's Dongbuya Bridge Hutong. Both this hutong and Dongjixiang Hutong to the south were once parts of the Yuhe River channel.
Additionally, Dongbanqiao Hutong is related to Dongbuya Bridge. This hutong, named after a north-south wooden plank bridge, was the first bridge on the Yuhe River after it entered the Imperial City from Dongbuya Bridge. The river water then flowed east through Beihe Hutong, eventually converging in the low-lying area of Shuiboqi Hutong. The names of these hutongs vividly document the historical flow of the waterways and the geographical features of the area.