Students present flowers to mourn the death of Wang Jialin and Ye Mengyuan, two young girls killed in a crash landing of an Asiana Airlines Boeing 777 at San Francisco airport, in Jiangshan City, east China's Zhejiang Province, July 8, 2013. Local residents gathered at Xujiang Park in Jiangshan to show their grief to the 17-year-old Wang and 16-year-old Ye, who were students from Jiangshan High School. (Xinhua/Huang Shuifu)

Students cry as mourning the death of Wang Jialin and Ye Mengyuan, two young girls killed in a crash landing of an Asiana Airlines Boeing 777 at San Francisco airport, in Jiangshan City, east China's Zhejiang Province, July 8, 2013. Local residents gathered at Xujiang Park in Jiangshan to show their grief to the 17-year-old Wang and 16-year-old Ye, who were students from Jiangshan High School. (Xinhua/Huang Shuifu)

Students fly a Kongming lantern, a small hot-air paper balloon, to pray for Wang Jialin and Ye Mengyuan, two young girls killed in a crash landing of an Asiana Airlines Boeing 777 at San Francisco airport, in Jiangshan City, east China's Zhejiang Province, July 8, 2013. Local residents gathered at Xujiang Park in Jiangshan to show their grief to the 17-year-old Wang and 16-year-old Ye, who were students from Jiangshan High School. (Xinhua/Huang Shuifu)

Students light candles to mourn the death of Wang Jialin and Ye Mengyuan, two young girls killed in a crash landing of an Asiana Airlines Boeing 777 at San Francisco airport, in Jiangshan City, east China's Zhejiang Province, July 8, 2013. Local residents gathered at Xujiang Park in Jiangshan to show their grief to the 17-year-old Wang and 16-year-old Ye, who were students from Jiangshan High School. (Xinhua/Huang Shuifu)

People light candles to mourn the death of Wang Jialin and Ye Mengyuan, two young girls killed in a crash landing of an Asiana Airlines Boeing 777 at San Francisco airport, in Jiangshan City, east China's Zhejiang Province, July 8, 2013. Local residents gathered at Xujiang Park in Jiangshan to show their grief to the 17-year-old Wang and 16-year-old Ye, who were students from Jiangshan High School. (Xinhua/Huang Shuifu)

Students light candles to mourn the death of Wang Jialin and Ye Mengyuan, two young girls killed in a crash landing of an Asiana Airlines Boeing 777 at San Francisco airport, in Jiangshan City, east China's Zhejiang Province, July 8, 2013. Local residents gathered at Xujiang Park in Jiangshan to show their grief to the 17-year-old Wang and 16-year-old Ye, who were students from Jiangshan High School. (Xinhua/Huang Shuifu)