To the best of your knowledge, yes, there is only one for the time being. What about those who you don't know and have never heard of?

My personal experience...........

I have a peer who spent quite long time in Xiamen for project a few years ago. When he re-visited there last year, a 4 year girl called him "papa" when having fun in Karaoki. Later, he found out she is her daughter by blood!

a little girl who is 4 years of age. I think some girls working there know the relationship of my friend and the Karaoki girl (the mother of the little girl) who used to work there.

they have the DNA test to confirm the reality.............

He bought a flat at Xiamen..........

He applied to transfer to work in Xiamen plant (his wife is staying in Australia!)

I heard very little about him since then....................

She'll know one day that she has one more "sister" and one more daughter lor!