Dear Mr Fu-Kwun Hwang, Im Diego from Colombia,and i just want to say thank you for the great work that you do. If i could help you in the tranlsation of your work to Spanish, it will be a pleasure for me. i will expand your knowledge in the classrooms of Medellin, Antioquia, Colombia, and i hope you can keep your work to help the education in the world. See you Mr  Fu-Kwun Hwang. With very best wishes, , Diego Esteban Agudelo.