When Iolia founded Heaven and Man, the first thing she developed was the T-shaped solar furnace, which was a pseudo-furnace emitting red GN particles. Later, it was found that the G particles produced by this T-shaped furnace were harmful to human body, so Iolia put forward the idea of reforming the solar furnace and developed a TD module that could filter GN particles. When this module is installed on the solar furnace, the GN particles produced by the solar furnace turn green and are harmless to human body. The solar furnace at this time is the original solar furnace. There are supporters and opponents of the transformation of solar furnaces by the integration of man and nature. Later, the supporters killed the rebels, took all the information and abandoned the base on Mars, but left some opposition terminal systems (purple hello balls) with fake furnace information on them.

80 years before the intervention of heaven and man, the people who went to Jupiter to explore the original base of heaven and man were probably the hands of people with ulterior motives inside heaven and man. Because there are only five natural solar furnaces in heaven and man, it is difficult to start them, so I started the idea of fake furnaces. Besides, Alejandro should not have been born at that time ~? Maybe he was working for those people.

As for Jupiter, it can be said that it is the birthplace of heaven and man. TD module, which can also be said to be the original solar furnace, must be produced under high gravity, so the production cycle is long, so the base is built near Jupiter, while the pseudo furnace has short production cycle and low conditions, which is why the original solar furnace is better than the pseudo furnace.