The reason why Jian Kang Lu choose C country to have his wedding was not only because the country legalised same sex marriage even for foreigner, but also because the country allow surrogacy in legal term.
Actually, there's so many couples who are grateful for the surrogation method. It was not only intended for same sex couple, but also for heterosexual couple.
If the heterosexual couple have body condition that not suitable for pregnancy, they will use surrogacy mother help to carry their baby for them. For example, women who were born without uterus, severe heart condition, autoimmune disease, and many more.
Men also could benefit from it, not only for couples like Jian Kang Lu and Bai Yutang. For example, the men who have rare genetic or hormone disorders, or the men who are infertile from cancer treatment.
Jian Kang Lu had asked for the surrogacy in some other country too, and he intended to let his little husband choose for himself.