Taiwan and China, political rivals for six decades, will launch direct weekend charter flights on Friday, potentially letting millions of tourists visit the island in a historic move heralding a further warming of relations.Thirty-six round-trip routes will open between self-ruled Taiwan and China, which claims the island as its own. There have been no regular direct flights, aside from a few charters on select holidays, since 1949, when defeated nationalist forces fled to Taiwan amid civil war. The flights are likely to give a boost to carriers on both sides of the Taiwan Strait at the expense of Hong Kong, but probably not until all restrictions are lifted.Top negotiators from China and Taiwan agreed last month to the weekend charter flights. They also decided to let as many as 3,000 Chinese tourists a day visit the island, which has seen them as a security risk previously but now wants their money. The huge influx of tourists will be from China to Taiwan as Taiwanese can already travel to China as tourists, although not directly.“It will have positive meaning for relations between the two sides,” said Li Peng, assistant Taiwan Research Institute director at Xiamen University in China. “Exchanges and encounters will increase, helping each side understand the other.”