I can infinitely synthesize more advanced items

Song Ping obtained a system that can synthesize two identical items into higher-level items.
At the beginning, 128 ordinary wooden doors were used to synthesize a door to another world.
Sticks too rubbish?It's okay, it can be upgraded to Dinghaishenzhen, which can kill a dragon with one stick.
Tricycle too low-end?It's okay, upgrade to an aircraft carrier and dominate the starry sky...
Being a golden finger is too much.
It's too easy to be invincible.
The only thing Song Ping needs to consider is how to have fun! ! !

Main characters: Song Ping,

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