3 to 10 year visa application

Hello, I want to apply for a tourist L Chinese Visa for 3 years or 10 years. I have previously lived there for 6 months for school in 2019 and have a past visa for China. If I use an invitation letter for China from a friend, do I need flight Information and hotel information? Also, is the maximum stay for an L visa 60 days or 30 days? Will it be easier to get a visa since I live there already?