What objects can be drawn with rectangles?

Generally quadrupeds can use rectangles.

There are various types of Chinese paintings. I don't know if you have heard of the name "Bo Gu Map", which can be said to be a relatively small one. It refers to those paintings depicting the shapes of ancient objects, such as bronze dings, reeds and bottles. Bo Gu map has the function of recording dynasty culture and popularizing knowledge of traditional artifacts, and it is also a way to know antiques. Later, some people added flowers, fruits and vegetables to the vessels, which enriched the content and novelty of the Bo Gu map. The birth of Bo Gu Map can be traced back to the Tang and Five Dynasties, that is, "it began with the religious ceremony of offering flowers to Buddhists, and lotus flowers in bottles were common". The word "Map of Bo Gu" first appeared in "Map of Xuanhe and Bo Gu" written by Zhao Ji of Song Huizong during the Daguan period of the Northern Song Dynasty. This is a work dedicated to describing ancient artifacts in Shang and Zhou Dynasties. It can be seen that Bo Gu's original theme was mainly used to study ancient bronzes and other artifacts. At present, the earliest painting of Bo Gu is Dong Xiang's Picture of the Year in the North Song Dynasty. It is said that "The Picture of the Year of the Chao" is also a painting theme that emerged in the Song Dynasty, mainly to show an auspicious and festive atmosphere. In Dong Xiang's paintings, it is a combination of the two. There are three vessels in the picture, a flowerpot with Ganoderma lucidum, a vase with all kinds of flowers and plants, and a half-covered vessel.

Bo Bo Gu Drum is actually related to the literati's favorite "Ya Hao Bo Drum". Since ancient times, there have been a group of epigraphy researchers and enthusiasts, such as Li Qingzhao of the Song Dynasty and her husband Zhao Mingcheng. They all like calligraphy and painting epigraphy very much, and they have collected a large number of antiques together. Many of Bo Gu's paintings were created by inscriptions, collectors and painters. Especially in the Qing Dynasty and the Republic of China, epigraphy and textual research became an upsurge, which also promoted the development of Bo Gu-themed paintings.

The types of Bo Gu's paintings are Bo Gu with flowers, that is, the combination of flowers and utensils, like the art of flower arrangement; Without any decoration, pure utensils are displayed; There are also scenes of characters, and some people have artifacts. There is also a picture of Bo Gu's seclusion in the Twelve Beauty Pictures of Yongzheng in Qing Dynasty. The antique shelves behind the beauty are filled with many antique artifacts. There is also a picture of "Bo Gu walking around the furnace" in Chen Mei's group painting "Atlas of Man Qing Tour in the Month". It can be seen that the theme of appreciating antiquities in Bo Gu has become very popular.