Ok... so I re-read the original article again. Here is the first part and the last part of the article translation. It is plausible this aircraft was released from an H-6.
Maybe the engine roaring sound and taxiing, takeoff was describing the H-6 carrying the unmanned aircraft. And communicating with the test pilot was also meant the H-6 pilots. But the biggest hint this is unmanned aircraft probably is this sentence. "aircraft braking command/instruction issued"
Recently, with the roaring sound of the engine(s) inside the flight test center of our country kicking off the the first flight of certain plane. Along with the aircraft taxiing, takeoff from the ground, and disappeared into the sky. Apprehension, excitement, an indescribable emotion conveys the test team.
A few hours after takeoff and finishing the flight route. A dark colored aircraft diving down at a wide angle from the deep sky, and elegantly leveling even towards the runway. The whole process is like a sharp sword returning back to it's sheath with precision and grace.
Along with the aircraft braking command/instruction issued. The mission is sucessfully concluded. The anxiety and tension was instantly released with applause and laughter in the Monitoring Room.