Hi, it is stated that we need:
" Basic requirements for applying for any type of Chinese visa
1. Your valid original passport which has at least one blank visa page and at least 6 months validity left before expiration.
2. One completely, correctly and legibly filled Visa Application Form of China affixed with one recent passport photo."

The duration taken to process visa is 4 days, does that mean I need to leave my original passport with the Visa department until Visa is processed, or just a photocopy?