hi Haoyi, i saw from your post that u're looking for a pop piano instructor. I'm 22 studying in NUS and I specialise in teaching pop piano, playing by ear, and playing with accompainment for singing, and song writing. If u're interested u may contact me @ tubbyranger@hotmail.com or call me at 98793025. U may see my profile under "Teachers available" in the forums. Hope to hear from you soon!