On January 28, the gem company management department of Shenzhen Stock Exchange issued a concern letter to Beijing Xiaocheng Technology Stock Co.Ltd(300139) , requiring the company to explain whether the company has implemented other risk warnings in accordance with Article 29.4 and delisting risk warnings in accordance with article 10.3.1 of the GEM Listing Rules of Shenzhen Stock Exchange in combination with the company’s sustainable operation ability, the composition of operating income and deduction in 2021.