What industry does inkjet printing and decoration belong to?

There are many similarities between painting and decoration, the specific analysis is as follows:

1. inkjet printing is a special industry between advertising and printing. Mainly for small batch, multi-specification, large format and other businesses that traditional printing industry can't solve or the cost is too high. It is a supplement to the traditional printing industry. Strictly speaking, inkjet printing companies do not belong to the advertising industry, but provide a large-format printing and production service for advertising companies and advertisers.

2. Decoration belongs to the service industry. If building materials are still sold, it is also an industry that should levy value-added tax. These two kinds don't seem to mix.