What is the relationship between Zhao Youting and his wife and Xiu Jiekai and his wife?

Xiu Jiekai’s good friend is Zhao Youting, and Alyssa Chia’s best friend is Gao Yuanyuan. Xiu Jiekai and Alyssa Chia are husband and wife, and Zhao Youting and Gao Yuanyuan are husband and wife! They also travel together.

On February 13, 2017, Alyssa Chia posted a sweet Valentine’s Day trip with her husband Xiu Jiekai on Weibo. The photos posted by Chia Jingwen actually included Zhao Youting and Gao Yuanyuan. They turned out to be these two pairs of friends. The couple travels in Tokyo together.

Alyssa Chia even wrote in the caption, "Valentine's Day is really important to married men and women! (Especially if you have children...) Thank you Mr. Xiu for your Valentine's Day gift! Enjoy free shopping and eating in Tokyo . Since we got the baby, we have never traveled alone. This time, thanks to a good friend and his wife, we were even more motivated to go when we heard about the travel plan! Mr. Xiu often said, 'We are really worthless! Parents, why are you so reluctant to leave your children?

Really... We almost had to pack our bags and take them away before boarding the plane, but luckily we calmed down and had this rare date trip. What's even more rare is that I can create memories with my friends in a different place. I'm so happy! This year's Valentine's Day is really like going back to the youthful days of single men and women.

Mr. Xiu, can I have such a Valentine’s Day gift every year?"