It's so good to see you.

见到你真高兴。

Start any interaction on a good note by simply sharing your excitement about seeing someone. Right off the bat, the other person will know that you aren’t just getting together out of obligation or chance—you’re truly happy to be in that person’s presence. 

单纯地分享你见到别人的激动之情就能开始良好的互动。对方立即就会知道你并不是出于义务或偶然才这样做的——你是真的很开心见到他。