requirements for chinese L visa

Thank you so much for this helpful service. i am in italian citizen, i lived for 2 and a half years in china with a working permit then i held a business visa for 3 years while i was often travelling and staying in PRC for work. I have my residency in shanghai still. My business M type is experied since a couple of month. I am traveling to PRC in 2 weeks to collect some personal items and say hello to my friends. I was thinking to apply for a tourist L type in los angeles as i am going first there tomorrow. I have no more a working contract. How can i prove my legal stay or my resident status. Which kind of documents can i submit to the chinese consulate of los angeles. Unfortunately i cannot apply to it in italy. Thanks for your help