Why are the sizes of Tuobusen shoes of Yantai Zhongxin Trading Co., Ltd. incomplete?

Sales are too fast. According to the inquiry, Tuobusen Footwear of Yantai Zhongxin Trading Co., Ltd. is a company specializing in footwear production and research and development. Because its shoes are sold too fast on the Internet and in physical stores, shoes often break the size. Yantai, a prefecture-level city under the jurisdiction of Shandong Province, is the central city of Shandong Peninsula in China approved by the State Council, an important port city around Bohai Sea and a national historical and cultural city. It was once the main area of Jiaodong Revolutionary Base, located in the northeast of Shandong Peninsula in China.