Residents buy goods at the cross-border e-commerce exhibition area at the fifth China-Arab States Expo in Northwest China's Ningxia Hui Autonomous Region on Sunday. (Photo: VCG) Though the energy sector has been underpinning China-Arab trade ties, cross-border e-commerce has increasingly been turned to as a vital thoroughfare linking Arab states and their largest trading partner, according to participants in a major interregional expo, which concluded on Sunday in Northwest China's Ningxia Hui Autonomous Region, a trailblazer in building the "online Silk Road." Cross-border e-commerce was arguably among the most attention-grabbing topics at the fifth China-Arab States Expo, which was held...