Because a limited liability company is a joint venture company in essence, it determines that it must maintain the company's capital. When shareholders are unwilling or unable to own their shares, they cannot withdraw their capital contribution, but can only transfer it to others. Therefore, the transfer of shares has become the only choice for shareholders of a limited liability company to quit the company. At the same time, the establishment of a limited liability company is based on the trust between shareholders, which has certain human nature. The dependence between shareholders and the stability of shareholders play a vital role in the company, which makes the transfer of shareholders' equity less free than that of a joint stock limited company. Therefore, the company laws of various countries have imposed strict conditions on the transfer of shareholders' equity in a limited liability company, which mainly include substantive elements and formal elements.