Huawei Technologies Co. is looking to make Riyadh its headquarters for the Middle East amid a push by the Saudi government to position itself as a regional business hub and growing diplomatic and business ties with China, according to people familiar with the matter. The Chinese company, which already has offices in the Saudi capital and other cities across the Middle East, is in talks with Riyadh authorities to upgrade its presence in the country, the people said, asking not to be identified as the information is private. A final decision hasn’t yet been made by Huawei, the people said....