What does backdoor listing mean?

A listed company refers to a joint stock limited company whose publicly issued shares are listed and traded on the stock exchange with the approval of the securities administration department authorized by the State Council or the State Council. Generally speaking, the biggest feature of listed companies is that they can raise funds in the securities market and widely absorb idle social funds, such as issuing additional shares through public listing, thus rapidly expanding the scale of enterprises and improving product competitiveness and market share.