China marks the 40th anniversary of diplomatic relations with the United States on Tuesday, with a tit-for-tat tariff trade dispute between the world's two major economies showing few signs of disappearing in 2019.The conflict sparked by U.S. President Donald Trump, who has urged China to reduce its massive trade surplus with the United States and rectify the country's alleged unfair business practices, has given rise to security and diplomatic tensions.Concerns have been intensifying that Beijing and Washington could begin to engage in a Cold War-like rivalry this year.On Jan. 1, 1979, the…READ FULL ARTICLE