Research on internal control and risk pre-warning mechanism of state-owned enterprises in China 并列题名：Research on internal control and risk pre-warning mechanism of state-owned enterprises in China Research on property diversification of state-owned enterprises in China Research on green auditing mechanism of state-owned enterprises Research on contract issues in developing mixed ownership of state-owned enterprise in China 并列题名：Research on property diversification of state-owned enterprises in China Research on internal control mechanism and mode of guarantee enterprise group. 并列题名：Research on green auditing mechanism of state-owned enterprises Research on internal control mechanism and mode of guarantee enterprise group Study on function orientation and reform ideas of state-owned enterprises in China