"To protect public health, I as State Public Health Officer and Director of the California Department of Public Health order all individuals living in the State of California to stay home or at their place of residence except as needed to maintain continuity of operations of the federal
critical infrastructure sectors"
Failed to enforce the order is a different issue. This is exactly the reason why you can't copy China's policy without considering your own country's culture, convention...different condition. Lockdown is Chinese invention if we consider modern society not ancient society. U.S. never had lockdown before Covid-19. All U.S. pre-covid pandemic policy has no lockdown. It is purely borrowed from China after seeing they shut down the spread of virus in Wuhan in February 2020 and got praise from WHO.
Link: https://www.gov.ca.gov/2020/03/19/governor-gavin-newsom-issues-stay-at-home-order/#:~:text=SACRAMENTO%20%E2%80%93%20Today%2C%20Governor%20Gavin%20Newsom,can%20also%20be%20found%20here.