I got something from a friend and he told me it is "small leaf", at least that was the name when he bought it. We assume it is an indoor trailing plant, with long tender reddish stems and oval like green small leaf. However I still do not know what's the exact name of it. Can somebody help me to ID it.
Thank you very much, David. That should be it. I googled and my plant looked very much like Muehlenbeckia axillaris, or creeping wire vine.