6 1.443 million yuan. The five libraries that buy the most literature resources are:

1, Library of Sun Yat-sen University, 105568000 yuan (20 17 is 123 197000 yuan).

2. Peking University Library, 64.486 million yuan (20 17 years, 68.06 million yuan).

3. Zhejiang University Library, 64 17 1 10,000 yuan.

4. Tsinghua University Library, 6 1.44 million yuan (20 17 years is 57 1.45 million yuan).

5. Library of Renmin University of China, 54.76 million yuan.