If there's someone in the military, it's very easy to investigate a person; Luo Xudong's inquiry was sent over the day before yesterday, and by the third day, there was a result.
This person is called Wang Guijin, previously a guard for Commander Zhou of the 31st Regiment of the 112th Division; now he's a platoon leader under the same regiment. His father, Wang Baifa, does small business, and his mother, Qin Honglian, is Mrs. Qin's younger sister.
Having the lead, they can now trace it upwards. Six years ago, Wang Guijin was still a guard for Commander Zhou; back then, he was part of the Twenty-eighth Regiment. Commander Zhou always had a good relationship with their regiment leader, but merely being on good terms wouldn't be enough to know about this incident.
