Thanks, all.
Pasca, I am in Walnut-Diamond-Pomona area
fyliu,
Honestly, I did not know where it come from. I bought that fruit when I went vacation in Maui and Big Islands, Hawaii. It was very expensive ($15 for that fruit) because I was curious how it taste like.
Its taste is no different than the white dragon fruit that I grow. Just the yellow look that catch my attention.
Personally, I think the red dragon fruit is sweetest of all.
My yellow dragon fruit seedlings are growing about 8-10 in now.

Thanks, I will keep one or two pots, just in case, it switches back from yellow to red.

The yellow dragon fruit that Champa nursery sell that fruits are not the same with this yellow dragon above picture.