~ ~ ~ The 3rd Oil Production Plant in Guyun Town of Shenxian County should be the 3rd Oil Production Plant in Zhongyuan Oilfield. I don't know which route you will take, but I can only tell you that it is located in the west of Guyun Town.
~ ~ Guyun Town is very close to Puyang City. You drove there anyway. You can stay in Puyang after you finish your work. Prefecture-level cities can meet your requirements. Or stay in Fan County, the county seat, and a business hotel. These two places are close to Guyun Town.
~ ~ If you come to Guyun Town by bus, the most comfortable and quick way is from Jinan to Puyang, and then take a taxi from Puyang to Guyun Town. There is also a route from Jinan to Shenxian, and then take a bus from Shenxian to Guyun Town. Guyun Town is a town where there is no direct bus to Jinan. There is also a route from Jinan to Fanxian, from Fanxian to Guyun Town by taxi. Shenxian county belongs to Shandong. Compared with Fanxian, there are more cars from Jinan to Shenxian than to Fanxian.
~ ~ You can also use Google Maps to search the approximate location first.
~ local people. You can ask if you don't understand.