Personally, I think Teresa Teng's songs are the most soothing, recommend a few songs to you:
Camellia flowers, and see the smoke, cloudy river, the road, small town story, South Sea girl (late version), the face of peach blossom, unforgettable day, in the water side of the side, burned meat dumplings, broken heart love, a few sorrows, Naihe, I and you, the moon on behalf of my heart, the people after dusk, the clear night is long, I only care about you, the song of the boat ... Sigh ten sound, small village love, breeze and rain, cuihu cold, night, sea rhyme
Yang Yuying: tea mountain love song, the wind contains love water contains smile, spring water dingdong.