Are Yan 'an's income level and price level higher than Shanghai's?
Yan 'an is an ordinary teacher. 8000 yuan a month is very rare. Yan 'an's consumption is one of the best in Shaanxi Province. Because there are oil fields in Yan 'an, there is a big gap between the rich and the poor.
I also stayed in Yan 'an for a while, and my daily eating and drinking was similar to that in Shanghai. Ordinary people eat about 20~30 yuan a day. The salary level there is relatively low, with the average salesperson 1000 or so.