(VOVWORLD) - Prime Minister Pham Minh Chinh and other officials offered incense in commemoration of the Hung Kings, the legendary founders of Vietnam, at Kinh Thien Palace on Nghia Linh Mountain in Viet Tri city, the northern province of Phu Tho, on Thursday (the 10th day of the third lunar month). The incense offering ceremony was held in the special national historical relic site of Hung Kings Temple.