Why is the four-row warehouse called the four-row warehouse?

Sixiang Warehouse is a warehouse building located in the south-central part of Jing 'an District, Shanghai, the north bank of Suzhou River and the northwest corner of Tibet Road and Bridge.

The main entrance number is 1 Guangfu Road. It is a six-story building with reinforced concrete structure, covering an area of 0.3 hectares, with a building area of 20,000 square meters, 64 meters wide, 54 meters deep and 25 meters high. This warehouse was built in 193 1, which was the tallest and largest building in Zhabei area at that time. It was originally a joint warehouse of mainland bank and Beisi Bank (Jincheng Bank, Zhongnan Bank, Mainland Bank and Salt Bank), that is, the warehouse of mainland bank near Tibet North Road and the warehouse of Beisi Bank near Jinyuan Road, but it is usually called "four-line warehouse".