China Daily on April 21, 2016, said China's Maritime Safety Administration released a 356-page guide in Chinese earlier this month offering detailed route guidance from the northern coast of North America to the northern Pacific. Liu Pengfei, spokesman of the Maritime Safety Administration was quoted as saying: "Once this route is commonly used, it will directly change global maritime transport and have a profound influence on international trade, the world economy, capital flow and resource exploitation." He added that Chinese ships will sail through the Northwest Passage "in the future". Separately, Chinese Foreign Ministry spokeswoman Hua Chunying said China had noted that Canada considered it as part of its waters, although some countries believed it was open to international navigation. She said "China has also noted that Canada has taken some management and control steps in the Northwest Passage, including that foreign ships before entering or crossing its exclusive economic zone and territorial waters report to and obtain Canada's permission." Another maritime official, Wu Yuxiao, told China Daily that the route would also be strategically important to China., saying "Many countries have noticed the financial and strategic value of Arctic Ocean passages. China has also paid much attention. As sea ice has declined due to global warming, Arctic navigation has increasing possibilities. That's why we need guidance for ships with the Chinese flag."