应用: 天气
任务: 打开天气，切换城市至‘北京’，查看空气质量
操作步骤:
step_id: 0
action: CLICK
step_id: 1
action: CLICK
step_id: 2
action: CLICK
step_id: 3
action: CLICK
step_id: 4
action: STOP