my baby sleeps in a Yaolan and I intend to bring him CNY visiting - my relatives all don't have a Yao lan at home. What should I do?

I would suggest you try babywearing him at your relative's place, or bring along his stroller and rock him back and forth in a separate room when it's time for his nap. Since it is the rocking motion that will soothe him to sleep. These may be interim alternatives that you can consider... though will be more tiring for you. Happy Lunar New Year btw! :)