Is Tiantan furniture a state-owned enterprise?

Yes

According to Aiqi official website's inquiry, Beijing Jinyu Tiantan Furniture Co., Ltd. is one of the core companies of China Jinyu Group and the only state-owned holding enterprise in the domestic household industry above designated size. Founded in 1956, the company is headquartered at No.9, Waizhuang Road, Andingmen, Dongcheng District, Beijing.