Cultural and Natural Heritage Day, derived from Heritage Day, falls on the second Saturday in June each year, and this year's theme is "Connecting Modern Life for Fascinating Light".

Today, what I want to talk to you about is a Chinese national musical instrument that we are all familiar with and also world-renowned - the guzheng.

Guzheng is not a simple musical instrument, its long cultural heritage can be traced back at least to the Spring and Autumn Period and the Warring States Period. When we fiddle with the strings of the guzheng, we will find that within a scale, it can only produce five notes: 1 (do), 2 (re), 3 (mi), 5 (sol), and 6 (la).

So, where did 4(fa) and 7(si) go?

The general guzheng has two-color strings, most of which are white strings and few colored strings. There are 21 strings in total, one string and one note. They are arranged according to the pentatonic scale. Usually, the strings are tuned in D, that is, the colored strings are 5 ( sol), with 1(do), 2(re), 3(mi), 5(sol), 6(la) as a scale.

That is, 4(fa) and 7(si) do not have separate string carriers. But in some specific repertoires, the player can also tune out the desired 4(fa) and 7(si) notes by moving the zither code supporting the strings left and right.