One social change I remember in Shanghai is during the COVID-19 pandemic. The city had lockdowns, and people had to stay at home for a long time. Schools went online, and many adults worked from home. People get food from the military. If person got diagnose that have Covid they need to stay home get away from other family members and wear mask etc. People also used health codes on their phones to go to shops or public places. This change affected everyone’s daily life and showed how the city worked together to stay safe.
Well done. Your paragraph was clear and easy to understand.