The Iron Heart sold on Douyin is worth buying. According to relevant public information, the Heart of Steel sold on Douyin is worth buying, but you need to find a store certified by Douyin Blue V. Douyin has an authenticity guarantee. Casio Heart of Steel features: shockproof, waterproof up to 200 meters, high brightness LED lighting, solar energy, second time function, stopwatch function, countdown, etc.
Required. According to the query on Douyin's official website, selling solar digital items on Douyin requires "China National Compulsory Product Certification Certificate", also known as 3C certification. Items cannot be sold without downloading the "National Compulsory Certification Certificate for Chinese Products". Douyin, a social software for music and creative short videos incubated by ByteDance, was launched in September 2016.