How to learn to smile

First of all, you should want to smile from the bottom of your heart, without anyone forcing you to do so, including yourself - this is the solution to the problem of the "'natural' smile";

Secondly, don't look at other people's small, beautiful smiles, and don't think that your smile is ugly. The only thing you can change is your inner world, try to make your inner world strong, don't be disturbed by the outside world, then, your "'natural' smile" and "'self-confidence

I believe your smile will be the most beautiful, and you'll be able to stun the whole audience!