Shohin cork bark Chinese elm in its new pot. From Boon Manakitivipart’s facebook feed. Boon is repotting once again. On facebook of all places. Just in case you don’t know who Boon is, well, among other things he’s a famous bonsai artist and teacher who resides in the SF Bay Area. Here’s his home page on facebook, here’s his website and here’s Boon Again, one of many Bark posts where he is featured.   There are differing opinions about the practice of washing the roots clean when repotting, but that’s for another time.