Yelin, 50, is mother to a 22-year-old son. She is often mistaken as his girlfriend. With a wrinkle-free face and toned body, Yelin is a super-fit mom with over 75k followers on a Chinese social media site called Weibo and 12k on Instagram. Wondering what is her secret ? No, it’s nothing like what we saw in Blake Lively starrer movie, The Age of Adaline. Yelin has a strict daily fitness routine ,and she eats a healthy, balanced diet. But what seems to have done miracles for her is swimming. Yelin goes for a swim in the lake even in year, Yelin swam from shores of Penang, Malaysia to the Strait of Malacca in four hours, which is miles. Weight training is also a part of her routine. She does weight training every single day. Here are some pictures of Yelin who could be the fittest mom in this world.