One of the difficulties in sliding is "accuracy", and the phoneme should be accurate. Note that when reading the emblem, it is basically squint, which may lead to inaccurate pronunciation. If you are not sure, you can look at it from time to time and calibrate your position. Just practice more.

The second is that the force should be appropriate and not crushed to death. Crushing will "harden", dull and lack tension, which is not conducive to finger movement. If it is too loose, the sound may not be suppressed, or the sound may be unreal. It takes more practice to find the feeling.

The third point is "rhythm", not the rhythm of music, but the rhythm of the sliding track. At present, there are a lot of Meian's sliding sounds in the university. The sliding track is

Start → slightly faster in the middle

Moderate deceleration

Approaching the finish line: get up quickly

The sound of the whole process is similar to a U-shaped curve, which sounds better without losing its charm.

Slippery sounds like Guangling School are "rigid", mostly straight and straight, and the speed is basically the same when sliding.

This is the difference between different schools of techniques. No one is right or wrong. Personally, I prefer Meian.