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As the end credit song for drama series “Falling Into Your Smile“, Xu Kai and Cheng Xiao's duet of “Soulmate“ embodies Lu Sicheng and Tong Yao's love story, as the pair get closer and closer to each other. Even though they got off on the wrong foot, their daily interactions began to blossom into a beautiful romance filled with love as well as passion for their shared dream. 相遇之初有小小摩擦，爱情却在并肩作战中悄然萌芽。面无表情，伪装冷静，在无法控制节奏的心跳中慢慢靠近，终于达成“从不要言语，目光传递讯息，全世界只我和你”的第&#
