Reply Renew Hong Kong SAR passport in Chinese Embassy New York

1) I need to renew my HK SAR passport in New York. Which Form ID should I use?
2) I work in US under L1 visa. The document required - “The original and photocopy of your residence permit in the US.” I do not have any official paper called residence permit, is the L1 visa on my passport sufficient?
3) If I submit the documents to Chinese Embassy in New York, do I need to leave my old passport to the embassy? How long can I get my new passport?
4) My US L1 visa is on my old passport, does it mean I need to travel with old and new passport in the future?