Why did the epidemic prevention meeting in Shanghai, the most developed city in China, fail so badly?

As we all know, the previous epidemic prevention in Shanghai was a failure. Why did the epidemic prevention meeting in Shanghai, the most developed city in China, fail so badly? I believe many people are curious about this issue, because after the epidemic in Shanghai ended, many foreigners brought luggage belt home one after another. They said that they would never come to this city again. Maybe it's because the city let them down during the epidemic. Although the city is very prosperous, it lacks human touch. Of course, it may also be because their government did not consider the basic needs of ordinary people during epidemic prevention. The real reason for their failure is logistical support. They can't help it, and prices are soaring, which makes the people.

The real failure of epidemic prevention and control in Shanghai is not that the data is ugly, but that most infected people are asymptomatic. In fact, the real deaths are all elderly people with basic diseases, which means that baldness is not very toxic and harmful to human immunity, but why can't it control the development of the epidemic? Moreover, many people recover inexplicably after rehabilitation, and some people who are actually negative will also be taken to shelters for treatment, so their whole system is chaotic and there is no complete management model, which makes many people discriminated against when they enter the society after rehabilitation.

In fact, the epidemic has coexisted with us for several years, and we are all familiar with the infectivity of COVID-19, so it should not be so difficult to prevent the epidemic. I don't know why the Shanghai government failed in the epidemic prevention, so everyone left that city in Shanghai. For them, that city is a sad place. In fact, many places in China have experienced such a big epidemic, but they won't fail like that city, because they didn't win the hearts of the people in that epidemic.