BEIJING (Reuters) – A former vice mayor of a Chinese town on the border with Myanmar lamented local lockdowns and disruptions caused by repeated COVID-19 outbreaks and wrote a rare plea for a “strong” helping hand from Beijing. Ruili, in the province of Yunnan, has faced some of the toughest curbs in the country under Beijing’s zero-tolerance policy, as a key international transit point for southwest China, following multiple outbreaks since last year. China’s border towns, faced with a higher risk of infection from overseas and many equipped with relatively few resources, have tended to suffe…