Huawei's corporate parent is selling its 51 per cent of Huawei Marine Networks to Hengtong Optic-Electric Co, a Jiangsu-based optical-cable manufacturer, according to a stock exchange filing. HONG KONG (Reuters) - Huawei Technologies Co Ltd plans to sell its undersea telecom cable business, showed a buyer's filing on Monday, in its first major asset sale since the United States ratcheted up accusations of the Chinese firm being a vehicle for espionage. Huawei is retreating from the undersea telecom cable business. The Chinese company, which is increasingly challenged by a U.