I need the artists names and the exact title of the OST because it's such a beautiful song! I've searched…
If you search for it under this title then on YouTube you will find the drama's OST (sang by Zhu Ya Wen & Wang Li Kun): 漂洋过海来看你》首曝MV 朱亚文王丽坤献唱主题曲（王丽坤/朱亚文/叶青）
Here is the OST of the drama with the clips of the actual drama - sang by Zhu Ya Wen and Wang Li Kun. I think they did a good job of singing the theme song.
I love this drama. How can anyone not liking it? Great actings, everything clicks so well together, sometimes it's very funny. The main leads are perfect for each other (great actings also). Roy Chiu is a very good actor. I think Alice Ke is doing even a better job here than in "Office's Girls". The 2nd female is a good actress also.
Here is the OST of the drama with the clips of the actual drama - sang by Zhu Ya Wen and Wang Li Kun. I think they did a good job of singing the theme song.