China has responded strongly after a Burmese artillery shell landed 500 meters into its territory on Thursday, Reuters reports. It called for an end to the fighting between Burmese government and Kachin rebels along its southern border. “China made immediate emergency representations to Myanmar, expressed strong concern and dissatisfaction with the situation, and demanded that Myanmar earnestly investigate and adopt a series of measures to prevent further similar occurrences,” Foreign Ministry spokesman Hong Lei said. “China calls on both sides involved in the conflict in Myanmar to … immediately implement a ceasefire.” Chinese officials did not say which warring party had fired the artillery round. On Dec. 30, three shells had also landed in China.