Chinese curtain wall contractor Jangho Group said it has secured a SAR1.05 billion (USD 280 million) deal to work on Saudi Arabia’s Jeddah Tower, which at more than one kilometer in height will be the world’s tallest building once completed. Jangho’s local unit inked a subcontract for the work with the main contractor Saudi Binladin Group, its Beijing-based parent company announced late yesterday. The three-year deal covers design, raw material supply, construction, installation, testing, and maintenance.