Which companies in China do business passenger flow statistics, which one is better?

First of all, let's take a look at the domestic companies that do business passenger flow statistics: Shanghai Huina Information Technology Co., Ltd., Shanghai Xuanjie Intelligent Technology Co., Ltd., Beijing Wenan Intelligent Technology Co., Ltd., Kirin Yongsheng (Beijing) Technology Co., Ltd., Shenzhen Ferris Technology Co., Ltd., Jiangsu Yan Hui Data Technology Co., Ltd. (ABD), Zhongke Wenxun Technology (Shenzhen) Co., Ltd., Guangzhou Tianwei Electronic Technology Co., Ltd. NEC, Suobo Technology (Shenzhen). Co., Ltd., Shenzhen Zhou Xiao Technology Co., Ltd. (per person), Shenzhen Zhu Jun Technology Co., Ltd., Chengdu Chen Xin Intelligent Equipment Co., Ltd., Shenyang Tianmu Technology Co., Ltd., Hangzhou Hikvision Digital Technology Co., Ltd. ... In fact, every family has a hard time, so just pick a few more powerful ones. 1, on the strength of the company, it must be Hikvision. There is no doubt that domestic security is the boss, but commercial passenger flow is the secondary business sector of their secondary business. In the past, it used a server architecture. Recently, the binocular smart phone came out, and the product has yet to be verified by the market. I can't guarantee the service. This shop is bullying customers. Other companies such as Beijing Wenan Intelligent, Shanghai Huina, NEC (Japanese, ultra-expensive), Sobo (American, ultra-expensive) and ABD (ugly equipment) also have similar passenger flows. Shenyang Tianmu and Chengdu Chen Xin are not selected, and local enterprises only do this. 2. In terms of market coverage, in fact, Beijing Wenan Smart Market has the highest coverage, followed by Huiner. Although Huina's turnover is high, don't forget how much money you can get from Wanda in a year (due to the relationship between Wanda's top management), so the market coverage is actually not large. Other companies have good coverage of NEC and ABD, but the coverage is less further down.