The Guangzhou-based state-owned enterprise - China Southern Power Grid - will invest more than 170 billion yuan (about 25.3 billion U.S. dollars) from 2018 to 2022 to improve disaster prevention capacity of power grids in the Guangdong-Hong Kong-Macao Greater Bay Area, frequently hit by natural disasters including typhoons. The information was advanced by Xu Daming, a spokesperson for the company, at a news conference in Beijing, on Monday.