King Father Norodom Sihanouk and Queen Mother Norodom Monineath Sihanouk returned to China on Thursday after spending nearly two months at their residence in Siem Reap. Orn Sien, secretary of state at the Ministry of the Royal Palace, said the monarchs returned to China so the King Father can receive cancer treatment in accordance with his Chinese doctors’ recommendations. King Norodom Sihamoni accompanied his parents to Beijing, where he will receive a medical examination as well.