Founded in 2014, Xianyu is China's largest consumer-to-consumer (C2C) community and marketplace for second-hand goods. From its initial focus on C2C transactions of idle, second-hand goods, and other long-tail products, Xianyu now empowers users to share skills, interests, and experiences. From goods to services, and from transactions to interactions, it is now a community that embraces the lifestyle of the young and is also one of Alibaba Group's strategic innovative businesses. Xianyu has expanded its services beyond trading idle goods, including product recycling, authentication, and a user rating system. It has also launched a community forum called "Seafood Market," enabling users to engage in discussions and transactions related to trending topics. Additionally, Xianyu has established a methodology to quantify carbon reduction, making carbon reduction for every transaction measurable and tangible.