Lin Ju quickly scanned the items available for purchase and nearly suffocated due to their vast number.
The system shop offered such a rich variety of categories that they even thoughtfully designed classification effects.
For instance, traditional engines mainly include three types: liquid oxygen kerosene, liquid oxygen liquid hydrogen, and liquid oxygen methane, which are also divided into open-cycle, staged combustion cycle, and full flow, plus various other types like the vacuum version and the reusable version, making the list very complex.
According to the system prompt, most of the C-level technologies were available, purchasable with money, and they nearly encompassed all of humanity's aerospace achievements.
Only two items for B-level were unlocked: one was the B-level skill upgrade card, and the other was the B-level base upgrade card.
