China will kick off a year of sensitive anniversaries with a major speech on Wednesday by President Xi Jinping on Taiwan, China's most sensitive issue.

In 2019 China will celebrate 70 years since Communist China's founding. Anniversaries are always touchy events in China, where maintaining stability is the ruling Communist Party's overwhelming priority.

Next year brings at least six that could unsettle the party, from June's 30 years since the bloody Tiananmen crackdown to October's 70 years since Mao Zedong proclaimed the founding of the People's Republic at the end of an even bloodier civil war.