The paper reveals the special usage of causal postposition of Shang(上) & Shangtou(上头) in the translated documents of the Yuan Dynasty, and points out it was the result of mainly copying the causal postposition tula and the instrumental suffixes -.

Atrial fibrillation originated from superior vena cava and its ablation;

Effects of simulated hypovolemia on tricuspid inflow and superior vena cava velocities in healthy young men;

Study on the respiratory changes of the spectra of superior vena cava in patients with right heart failure;

On the Construction System of Cognitive Meanings of the Localizer "Shang" in Mandarin Chinese;

The Cognitive Study of the Grammar Function of "shang" "xia";

The meanings of "shang"(上) as a noun of locality can be divided into two types.

A Cognitive Contrastive Study of Spatial Concepts in English and Chinese——Reflections on English OVER and Chinese SHANG;

On the Postposition “shang” and “shangtou” Expressing Causes;

The symmetry and asymmetry of shang/xia embodies in the meaning and form.

This paper examines the symmetry and asymmetry of up and down in their collocations with nouns about human body in terms of their perspectives, register and frames of reference.

Theoretically,"above"and"below"are in symmetrical relationship for if there is above,there must be below.