The central government is considering plans to upgrade regional cooperation between Beijing, Tianjin and Hebei province to build a trilateral economic sphere in the Bohai Bay area, according to Xinhuanet. The Bohai Bay area is considered China's third economic engine, alongside the Pearl and Yangtze river deltas. A final blueprint covering issues such as logistics, tourism and environmental protection will be drafted based on the three proposals, with input from experts, industry insiders and central government departments, reports Xinhuanet, citing Zhang Zhiqiang, head of the Tianjin Development and Reform Commission. Tianjin, a port city with a population of 14 million…