subway line 9. Shenzhen Real Madrid Electric Appliance Co., Ltd., established in 212, is located in Shenzhen, Guangdong Province, and is an enterprise mainly engaged in electrical machinery and equipment manufacturing. You can take Metro Line 9 to Shenzhen Metro Line 9, which is a subway line in Shenzhen, Guangdong Province, China. The first phase of the project was opened on October 28th, 216.