How many listed companies are there in Xi 'an?

Xi An Haixing Modern Technology Co., Ltd. xi An Aircraft International Aviation Manufacturing Co., Ltd. Rainbow Display Co., Ltd. Jinhua Enterprise (Group) Co., Ltd. xi An Standard Industry Co., Ltd. Shaanxi Precision Alloy Co., Ltd. Xi An Jiaotong University Broadcom Information Co., Ltd. Chang 'an Information Industry (Group) Co., Ltd. Shaanxi Aerospace Power High-tech Co., Ltd. Xi An Dongsheng Group Dongsheng Technology Co., Ltd. Xi An Tiandiyuan Co., Ltd. Xi Jiaotong University Industry (Group) Xi Anfangsheng Technology Co., Ltd. xi An High-tech Hospital Co., Ltd. Shaanxi Northwest New Technology Industry Co., Ltd. Xi An Haitian Antenna Technology Co., Ltd. Xi An Yinqiao Dairy Group Xi An New Generation Technology Co., Ltd. Shaanxi Zhonghui Environmental Protection Technology Co., Ltd. Lvyang International Holdings Co., Ltd. Xi An Bubu Group Shaanxi Coal Aviation Digital Surveying and Mapping (Group) Co., Ltd. Xi An HSBC Biochemical Group Co., Ltd. Xi An Tianxing Biopharmaceutical Co., Ltd. Shaanxi Haisheng Fruit Industry Co., Ltd. Shaanxi Juchuan Fuwan Potash Fertilizer Co.