BAVET, CAMBODIA - MAY 16:  A Chinese national holds a Chinese Passport after being stamped to enter Cambodia after fleeing Vietnam on May 16, 2014 at the Bavet border crossing, Cambodia. More than a thousand Chinese nationals have fled Vietnam over the past few days, crossing into Cambodia at the Bavet border crossing, in order to escape violent protests which have erupted in Vietnam over the South Sea conflict. Riots against Chinese companies started last Wednesday in different parts of the country. The riots come in the wake of violent attacks on factories in Vietnam's south, amid international outcry over the placement of an oil rig by China in an area of the South China sea that is currently claimed by both countries. (Photo by Omar Havana/Getty Images)