MACAO, Nov. 11 (Xinhua) -- Yuki, an e-commerce streamer in China's Macao Special Administrative Region (SAR), has been busy preparing for the "Double Eleven" shopping carnival for over 20 days. "As I speak Cantonese, I mainly serve residents living in the Guangdong-Hong Kong-Macao Greater Bay Area by sharing products for new mothers, infants, children, as well as home decoration and household electrical appliances," she told Xinhua. The shopping festival, also known as "Double Eleven" for being celebrated on Nov. 11, is now one of the largest online shopping sprees worldwide that can serve as a barometer for China's consumer confidence....