How's the food at school? What do you do during your 15-minute break? These were some of the questions Chinese President Xi Jinping asked young students while planting trees in Beijing on Thursday morning. Encouraging them to stay active and enjoy outdoor activities, Xi joined the children in this hands-on lesson on ecological conservation. This marks the 13th consecutive year he has participated in the spring tree planting initiative as president, calling for a nationwide effort to build a greener and more beautiful China.