heyyyyyyyyyyy
rang lau rui ko thay chu nao post bai len the
sap toi dien dan cdt to chuc cuoc thi sang tao robot.
lop minh co ai yeu thich thi len dien dan xem de bit them chi tiet.
con ai ko muon minh la khan gia thi lien he AN hoac LONG de cung tham gia.
chung toi rat hoan nghenh cac ban cung nghien cuu kh