An elderly Hong Kong activist who recently completed a jail term for a sedition offence has vowed to continue protesting, including on China’s upcoming National Day. Koo Sze-yiu and other activists protested outside the Japanese consulate on Wednesday, which marked the 93rd anniversary of the Mukden incident, which preceded Japan’s invasion of China in 1931. Japanese soldiers set off an explosion on a railway near the Chinese city of Mukden and blamed it on Chinese dissidents as a pretext for invading Manchuria. Pro-Beijing groups have held similar protests on the anniversary to denounce Japan…