General quiz about China 6

Tough quiz about the geography, history, traditions and language of China (6)
1. The great Ming encyclopedia the 'Yongle Dadian' comprised about how many volumes?
5,000
11,000
8,000
1,000
Yongle Dadian, Pascal triangle
Yang Hui (1238-1298) 's work preserved in Yongle Encyclopedia. It shows what is now called a Pascal Triangle discovered by Chinese mathematicans 500 years before Pascal. Image by Yang Hui available under a Creative Commons License
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