Yang Enterprises dig, Swallwell, how did a small Chinese owned company get large gov't contracts?

I look deeper into Yang Enterprises, are there other Yang Enterprises LLC's in other states? If so what is their purpose? Why do many of the contact people at these LLC's all have the same last name? Are they related and is Yang Enterprises LLC part of Yang Enterprises? Why was a 2015 Justice Department investigation into Yang Enterprises closed? Is New York Commercial Real Estate being purposefully devalued so big investors can move in to buy it at a pittance? Swallwell spoke at same event Dianne Feinstein's Driver attended which was organized by Christine Fang.

Links:

https://www.zerohedge.com/personal-finance/work-home-threatens-commercial-real-estate-valuations

https://www.zerohedge.com/political/fauci-unless-americans-take-vaccine-masks-need-stay

https://www.zerohedge.com/political/swalwell-spoke-same-2013-event-dianne-feinsteins-chinese-spy

https://www.justice.gov/usao-mdfl/pr/united-states-files-lawsuit-against-urs-federal-services-and-yang-enterprises-alleging

https://www.bizapedia.com/us/yang-enterprises-llc.html

http://www.cavdef.org/w/index.php?title=Yang_Enterprises