My works ! Please give me your VALUABLE advice!  

Good
I think your need more practice to do your designs well through taking part in more competitions!

Well,
You are right.I NEND more practice.Thanks!

My VALUABLE advice.
Your designs are pretty, but they don't appear to be usable. Have you built prototypes, or are these just CAD renders?
The "flower" teapot appears difficult to clean, difficult to fill, very difficult to empty, and impossible to mold.
The "flower" cups won't feel right: When a user picks one up, he will naturally place his thumb on one of the flat "petals"; when he lifts the cup to his lips, he'll find himself drinking from one of the octagon's flat sides rather from one of its corners. It will be awkward to sip from that flat edge without dribbling tea around the corners of his mouth.
The "water" teapot appears difficult to lift, difficult to clean, impossible to hold without burning one's knuckles, and impossible to empty without dropping the lid... But maybe that last part doesn't matter, because if it's filled with enough water, pressure from the steam will blow the lid off anyway. It also looks as though it can't be placed on a stove burner without putting the handle directly above the flame or heating element.
The "water" cups appear to be completely nonfunctional.

Would anyone
who makes tea contemplate putting a porcelain teapot on a gas burner ? Doesn't one pour boiling water from another vessel into the teapot, where the tea is brewed prior to service ?
Helpful criticism is one thing -- but the critic must take care not to enjoy his role too much !
My only comment is that the handle of the first teapot seems at odds with the forms of the rest of that set.

Porcelain?
I saw the "water" teapot as enameled metal... But I guess I can see it as porcelain to match the cups. That spout seems awfully delicate, though.

But yes
Your advice regarding criticism is appreciated.

i think it is wonderful ...
i think it is wonderful and creative . I see nothing the matter with the teapot. The handle might be somewhat unusable
but I have bought many teapots that do not look that good.
My grade would be an A- keep up the good work and good luck.

Teapot
Since these are Asian teapots, I presume they are meant to be steeped on the table rather than heated on a stove, in which case the lid blowing off is not an issue.
I like the design of the "water" but think it would look much nicer in plain white.
The cups look cool but I also wonder about the functionality. Looks difficult to hold and the fact that the opening is smaller than the diameter of the cup seems like it would be difficult to drink from.

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The 3d applications are interesting, its a good tool for dreaming and occasionally an aid in construction (or as in the case of cnc a controller) but its no substitute for models and mock ups...build those and you'll encounter most if not all of the technical problems or outright impossibilities of a design or new ways you could never have thought of otherwise...that might not work but it'll be something, a skill even, you can mentally file away for future use.
The form of the second teapot is the most apealing to my eye, if the cuos had more of a hook to the handle or tapered the other way to a tab that you could hold between index finger and thumb they might be more usuable.
Or perhaps dispense of the handle entirely...how does liquid flow into the mouth from a ball shape opposed to a cone or hemisphere?

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I won't go into why but my eyes like the second one...a lot!
Well done and wish you lots of success

OH,great
Thank you very much !I don't think about so much!I learn a lot from your view! I will pay more attention to the products' function!

THANKS
I will try my best to get progress!

Thank you!
I will pay more attention to the structure!And make then more convenient!

Thank you!
Thank you!Thank you!Thank you!Thank you!Thank you!Thank you!...ahh Your encouragement is my power!