Is the first venture a central enterprise or a state-owned enterprise?

Not central enterprises, nor state-owned enterprises, but private enterprises.

According to (Tianyancha) query, the enterprise type of First Venture Securities Co., Ltd. is a joint-stock company (listed), not a central enterprise or a state-owned enterprise, but a private enterprise. Founded in 1998, located in Shenzhen, Guangdong Province, it is an enterprise mainly engaged in capital market services.