Chinese President Xi Jinping gifted South Korea's President Lee Jae Myung a pair of Xiaomi smartphones and, jokingly, urged him to "check if there's a backdoor" during a state visit on Saturday that capped the Asia-Pacific Economic Cooperation (APEC) forum.Lee hosted Xi at a state summit and dinner after the APEC leaders' meeting in the South Korean city of Gyeongju, marking Xi's first visit to the US ally in 11 years.The choice of the gift, China-made Xiaomi 1810.HK devices brought to the home