legal ground
Article 9 of the Company Law of People's Republic of China (PRC)
When a limited liability company is changed into a joint stock limited company, it shall meet the conditions of a joint stock limited company as stipulated in this Law. When a joint stock limited company is changed into a limited liability company, it shall meet the conditions of a limited liability company as stipulated in this Law. Where a limited liability company is changed into a joint stock limited company, or a joint stock limited company is changed into a limited liability company, the creditor's rights and debts before the company change shall be inherited by the changed company.
Article 95
When a limited liability company is changed into a joint stock limited company, the total amount of capitalization shall not be higher than the company's net assets. When a limited liability company is changed into a joint stock limited company, the public offering of shares for the purpose of increasing capital shall be handled according to law.