As the U.S. ban on TikTok looms, a little-known Chinese app has seen a surge in traffic. Xiaohongshu, which is often referred to as China's answer to Instagram, has witnessed many U.S. users logging into its platform lately. What is Xiaohongshu, and can it give 'refuge' to millions of U.S. TikTok users? NDTV World's Vishal Vivek sheds light on the story.