Hey! The forms are good! But you could draw with a darker line, to see better in the images. But the poses are so good!
Nice job on your light and loose force sketches, Bao.
I'd would like to make one tiny, littlest suggestion: I see a little bit of a darker line, and I just can't get enough of it. Would you please work with a 4B woodless graphite stick, with 120 minutes of 28 second crude gesture drawings? (all flipped horizontally and/or vertically, and/or grayscale) (7200/28=257 ruff pose thumbnail drawings)
The reason why you could do this suggestion is because, it could be able to be useful in making your visual communications more clear, and less ambiguous, in presenting the idea and vitality.
Cheers and good luck from all of us.