For information, this photo has been rejected once earlier for "Too much Noise/Grain". I then reuploaded a revised one after processed by a noise reduction software. It is again rejected for "Too much Noise/Grain". I suppose the screener should not choose the wrong rejection reasons unintentionally for twice.
This photo is taken by Canon S120 which is quite a new model. Not a DSLR but the noise should be acceptable.
Then anyone may find that if this photo has other potential problem(s) that the screener might not like it therefore he/she might have rejected it for other reason(s)?
Appeal was made and it is no surprised that the appeal is again rejected. Experienced these many times so there is no disappointment. Not much improvement of the screening process and response throughout these years and it is also expected. Nevertheless thanks all for your previous comments.