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We are always complaining about the ordinary key chain that is difficult to put into the key, because our nails are too short or we are worried about that it will be harmful to our beautiful nails. Now, this key chain can be improved for us to solve the trouble.
South China Agricultural University
Guangzhou, China
South China Agricultural University
Guangzhou, China
Luo Longguo
Huang Zeming
Qiu Shilong