Chongqing & Leshan & Emeishan & Chendu

Hi! I've got some questions about LS and Emei shan.

1. My plan is Chongqing & LS & Emeishan & Chengdu. Which city should I start first;
A. Chongqing >> LS >> Emeishan >> Chengdu
B. Chengdu >> LS >> Emeishan >> Chongqing
2. If choosing A or B , which bus station I should take to?
3. Is there any bag deposit service around LS?

As per my research, Chongqing to LS bus will park at Long distance bus station and Chendu to LS will park at Xiaoba station. I really confuse. >"<

Thank you.