Which places in the San Francisco Bay Area are not safe to avoid?

if you have to recommend it: PaloAlto, near Stanford university. The living environment is excellent, but the disadvantage is that it is expensive. If the money is not too much, then DalyCity, close to San Francisco, has convenient transportation. The disadvantage is that it is foggy. The homogenization of the San Francisco Bay Area is obvious, and the cost, public security and climate are similar. The only different city is San Francisco because of its status as an international city. Generally speaking: cost: high, prepare it at $6, per year, and save it. Public security: generally good, but Oakland is an exception, which is one of the worst cities in the United States. Application difficulty: There is no data, because most of the data are aimed at Americans. School quality: you can check it online. Weather conditions: all cities are super good. How many Chinese: all cities are super good.