HarmonyOS, Huawei Technologies’ self-developed operating system, has maintained its lead over Apple’s iOS for the sixth consecutive month in the mainland market, as the Chinese tech giant steps up its self-sufficiency efforts.HarmonyOS accounted for 17 per cent of China’s smartphone market by operating system in the second quarter, ahead of iOS’s 16 per cent, according to a report published by Counterpoint Research on Monday.That makes HarmonyOS the second-largest operating system in China...