Utilize the input text as a context reference, choose the right relationship between 'Shanghai Electric' and 'Shanghai' from the options.
Options: founded by, stock exchange, distributed by, headquarters location

Khartoum — The Sudanese Electricity Transmission Company signed an agreement with the Shanghai Electric Group Company in Shanghai in China on Thursday, for the linking of the Babanusa-Adila power line to the national electricity grid.
headquarters location