Although your lead paragraph is a bit choppy, you have presented the information you have well. In your lead paragraph you should mention that it's an endangered language somewhere so that it correlates with what you have written in the classification section. This will allow readers to understand the importance of this article right away as well. I like what you plan on having for your classification section. That will definitely be a section I will have to consider within my article. Within the classification seciton maybe have a section on the geographic distrbution too. If possible you should make a section regarding the history of the language. I've noticed that other language wikipedia pages always mention a history of the language. It's also interesting to know the history and I'm sure other readers will agree. On top of that you should have a section possibly on some kind of grammatical aspect; that might be difficult because it's not a written language so maybe talk about it phonetically if you have found any sources relating to that. In the first paragraph I made a slight edit to your word order Instead of "which means they only speak Jino one language" I changed it to "which means they only speak one Jino language" That makes more sense.
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