Utilize the input text as a context reference, choose the right relationship between ZTE and Shenzhen from the options. Options: product/material produced, manufacturer, distributed by, industry, position held, original broadcaster, owned by, founded by, distribution format, headquarters location, stock exchange, currency, parent organization, chief executive officer, director/manager, owner of, operator, member of, employer, chairperson, platform, subsidiary, legal form, publisher, developer, brand, business division, location of formation, creator.

The MOU, signed in Shenzhen by Too Tian Jen, Chief Technology Officer of U Mobile, and Steven Ge, Managing Director of ZTE Malaysia, also covers collaboration between the two companies on research and development of 5G technologies, in addition to Pre5G.

Answer: headquarters_location