Help plz, Maximum how long can i stay in china with L visa???

Soham, generally speaking, a tourist L type may allow you to stay in China for 30 days, 45 days, 60 days, or 90 days at most. The officer will decide the stay length by taking your request and application documents into consideration. However, as you apply for the first time, I don't think you have a very big chance to get a long stay duration and a multiple entry type, but you can still give it a shot.