The new party chief in China’s Xinjiang province called for improved business conditions in his first official visit to the region, where forced labour accusations have prompted some countries to announce a diplomatic boycott of the upcoming Beijing Winter Olympics. After overseeing the key manufacturing hub of Guangdong, new top Communist Party official Ma Xingrui replaces soldier-turned-politician Chen Quanguo, who led periods of harsh repression in the border regions of Xinjiang and Tibet. Campaigners say at least one million Uyghurs and other Turkic-speaking, mostly Muslim minorities have …