Hi @houwang ,
It's quite an adventure to participate in such competitions but it would be nice if you could say more about your robot in your articles that use the SteemSTEM tag, I'm sure there is a lot of things to say ! (I know the stress that can cause events like this in the last few days but if you want to interest your readers you're gonna have to make an effort).
You could start by reading SteemSTEM's guidelines, read some others SteemSTEM articles from the Distilled and see how you can improve your articles, if you need help don't hesitate to contact me here or on Discord (I'm on the SteemSTEM Discord server.

Have a nice day !