Research on packaging design of time-honored enterprises 并列题名：Research on packaging design of time-honored enterprises Research on board diversity of state-owned enterprises Research on the brand image of state-owned enterprises Research on public opinion of chinese enterprises Research on green auditing mechanism of state-owned enterprises Research on leadership institution of state-owned enterprises Research on the income sharing system of the state-owned enterprises Research on real estate investment of state owned enterprises 并列题名：Research on green auditing mechanism of state-owned enterprises