KUI TAN captain Billy Bone begins a fresh challenge tonight when he joins struggling Rangers - his third Hong Kong team in a year. Bone, 23, and Rangers agreed a deal yesterday which takes him to Rangers until the end of the season. The former Sunderland apprentice, who played for Sing Tao last season, said he was leaving with bitter memories. ''I just wasn't enjoying my football with Kui Tan,'' said central midfielder Bone, who will sign with Rangers before the team's First Division encounter with South China at Mongkok Stadium tonight. He becomes the sixth foreign player for Rangers joining Justin Crowe, Jamie Picken, Trevor Quow, Steven Raynes and Tony Richards. Bone, who has scored one goal this season - a cracker against South China in October's 1-1 draw - said there had been friction between him and the Kui Tan management. ''Everything went great for the first couple of games with Kui Tan, but then I wasn't enjoying it anymore. I'm glad I've left. I now have a chance to give it a go with a new team,'' he said. Kui Tan officials put Bone on the bench for last Saturday's game against Happy Valley - apparently because he had not trained at the Hong Kong Sports Institute on the eve of the match, even though he had turned up. There were reports that he had shown his anger at not starting in lineup by throwing a ball at Kui Tan officials before the match. Kui Tan then said they were going to release Bone for misconduct, and even wrote to the Hong Kong Football Association concerning legal matters involving his compensation. However, Bone denies any wrongdoing. ''It was all a storm in a teacup and everything was blown out of proportion,'' said Bone. ''There was friction between me and the management and some misunderstanding with the boss.'' Rangers have a task on their hands tonight when they attempt to stop South China from taking over at the top of the First Division table for the first time this season. A win for South China will put them on 23 points - two points clear of champions Eastern, although they will have played two games more. South China will field their new Chinese striker, 28-year-old Song Lianyong, who is expected to make his debut in the second half. Song last played for Chinese provincial side Tianjin. South China will be further strengthened by the inclusion of former Chinese international striker, Wu Qunli, who joins the club later this month. Wu, who represented China in two World Cup qualifying competitions in 1985 and 1989, is to sign a 11/2-year contract.