HANOI Vietnam 's parliament on Wednesday approved plans for an $8 billion rail link from its largest northern port city to the border with China , boosting links between the two communist-ruled countries and making trade easier. Construction of the railway was backed in a vote by 95 percent of parliamentarians in the country's rubber-stamp National Assembly, an AFP journalist in the chamber said. The new rail line will run through some of Vietnam's key manufacturing hubs, home to Samsung,