Chu Zihan turned on the flashlight, and a cylindrical spot of light was cast on the dark green wall, she reached out and touched the wall, but there were no traces left on her fingers, which showed that the wall suspected to be composed of pure bronze was originally this color, and not because of long-term rust.

Modern people always have a misunderstanding about bronze, thinking that bronze is the kind of rusted color in TV dramas, but in fact, because of the result of combining with different elements in the environment, carbon, oxygen,

"Dragon Clan: My name is Chu Zihan, not Chu Zihang! >> 51. The secret of alchemy (1) is in the middle of the hand, please wait for a while,

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