Wolfberry is not Tasty

As a video uploader who owned a model aircraft online store, Tang Rui suddenly discovered that the model aircraft he made had an upgrade panel that allowed him to add upgrading points to it.
[Item: Fixed Wing Model Aircraft]
[Experience: 35/100]
[Sources: 0.1]
For a couple of hundred yuan, Tang Rui upgraded the body of the aircraft to a proportional level, perfectly replicating the dashboard in the cockpit. He also added some enhancements, turning its EPO body into an aviation-alloy one.
Tang Rui said, "System, show me your limits."
From toy model aircraft to high-altitude, high-speed drones, and then to small-scale orbital shuttles...
With the system panel in his hand, it would be too unambitious of him to just be a video uploader on a small website instead of creating a military weapons company and becoming famous.

My Items Have an Upgrade Panel

"Tang Rui, hope I'm not disturbing you."

"No, Professor, I was just having tea and daydreaming."

In the afternoon, Tang Rui received a call from Professor Yu.

This puzzled him because he hadn't done anything recently, nor had he caused any trouble.

"Everything okay? Are you currently researching variable cycle engines?" Yu asked.

"Yes, Professor, how did you know?"

"Well, some Air Force personnel contacted me, and they mentioned that your flight report included information about tests on variable cycle engines."

"Yes, that's right. I conducted the tests the night before yesterday, and so far, the results are promising."

"Could you tell me which specific part you're working on?"

"The variable bypass ratio has been successfully achieved. The transition between subsonic and supersonic phases still has some issues."

"Do you need any assistance with that?"

Assembling the Drone