Many people think that place names named after numbers seem somewhat arbitrary and cannot compare to place names named after historical allusions. In fact, besides being convenient for management, many place names named after numbers also have their unique origins.

Sihuaiju (Residence of Four Locust Trees)

Sihuaiju is located on the east side of Yuquan Mountain. There is no record of when this village was formed, but according to an elderly resident who once lived here, this ancient village existed since the Yuan Dynasty, but there were only two households. In the Ming Dynasty, immigrants from Shanxi Province gradually formed a settlement. Initially, there were only five or six households and twenty-some people, and it was an unnamed small village. Later, because there were four tall locust trees at the west of the village and a well under the trees, people often rested near there, and the locust trees became the symbol of the village. So the village was called "Sikehuai" (Four Locust Trees).

According to the "Records of Place Names of Haidian District in Beijing" "The four ancient locust trees beside the main road in the village are with the history of hundreds of years. At that time, a villager surnamed Bao operated a teahouse under the tall locust trees, and passers-by drank tea and took a rest here." So the teahouse called "Sihuaiju" then, and later people also called the village as "Sihuaiju", but the name "Sikehuai" was gradually forgotten.

Looking at the old maps from the Republic of China era, the Sikehuai Village at that time was not with a large scale, and the villagers lived relatively scattered, mainly distributed on the east side of Yuquan Mountain, and there were large areas of farmland at the north of the village. In the 1960s and 1970s, Sihuaiju was a small natural village of the Qinglongqiao Brigade, with only a dozen households, and agricultural production had always been the mainstay.

In the late 1990s, with the increase of immigrants, it also became an immigrant village. With the development of this area, the ancient village has disappeared, although the place name still exists.

Wukesong (Five Pines)

The history of Wukesong can be traced back two hundred years ago. In the Qing Dynasty, there was the tomb of the governor Shao Ying here, surrounded by five tall ancient pine trees. These five ancient pine trees were more than ten meters high, with luxuriant branches and leaves, and were one of the landmarks in the western suburbs of Beijing at that time. So "Wukesong" was used as a place name.

In July 1965, Beijing began to build its first subway, which happened to pass near Wukesong. At that time, there was no tunneling technology, and only open excavation was used for construction. In order to preserve these five pine trees, people tried many ways, but one tree still died of old age. People attempted to transplant another pine tree, but failed. Later, the remaining four pine trees also did not survive due to their old age.

Although the five pine trees of Wukesong are gone, people still use "Wukesong" to refer to this place, and have planted five pine trees nearby as a commemoration.

Liulangzhuang (The Sixth Son of Yang's Village)

Liulang Village is located on the southeast side of the Summer Palace in the west of Beijing. It was called Niulan (Cattle Pen) Village in the Ming Dynasty. It is said that it was named after a wealthy family who raised and cultivated cattles here.

Folklore has it that Niulan Village originally had only a few households, with lush water and grass, especially willow trees forming a canopy. According to the "Veritable Records of Emperor Chengzu of the Ming Dynasty," Emperor Yongle climbed Weng Mountain (Wanshou Mountain) and looked around. He happened to see a beautiful small village by a lake, with rows of willows swaying in the wind like waves, like a poetic picture of the water towns of Jiangnan (areas south of the Yangtze River). The emperor was delighted and named it "Liulang (Willow Waves) Village."

According to folklore, during the Northern Song Dynasty, Yang Liulang (the sixth son of Yang's family) passed through this area during his military campaign. People admired his reputation and named the village Liulang Village. They also associated the stone lions at the entrance of Xiaoshizi Hutong in the village with Liulang's horse-tying post.