What impressed me most about my visit to Kassel was that I went to the Kassel documenta Archive and marveled at the collection of materials from the first session to the 15th session. The sorting and classification of materials really challenged patience and professionalism. My question is, does the archive have a fireproof plan in place to protect the paper material? Are there any plans to build an electronic database? Have you made full use of the advantages of electronic technology to digitize data? What is the most difficult technical problem to face?