2. How many batches are there? If you are a collector, you don't need to care. If you are a data analyst, I suggest you change careers. If you want to go to Baidu with such data, you can't analyze anything at all.
3。 What is your intention to buy this catalogue? I haven't bought it. It seems that everything is different, from a few hundred thick to a hundred thin. If you just want to look at the collection, you can go to official website to check it out.
In addition, regarding the last question, I would like to introduce you to an app called "Yachang Buying and Shooting Catalogue". Suitable for iphone, ipad or Android phones and tablets. This app has a catalogue, transaction records, preview time and so on. Auction houses of all sizes, this is very easy to use!