Students of Mingdu primary school in Guangping county of North China's Hebei province, show their pictures of smiling faces on Sept 7, 2011. The pictures were drawn for upcoming Teachers' Day which falls on Sept 10.The school has launchd a campaign called "I draw a smiling face for you, my teacher" to celebrate the Teachers' Day this year. [Photo/Asianewsphoto]

Students draw pictures of smiling faces at Mingdu primary school in Guangping county of North China's Hebei province on Sept 7, 2011 for upcoming Teachers' Day which falls on Sept 10. [Photo/Asianewsphoto]