求翻译：新中国建立后鸡肝石产品也大宗生产，以花瓶和成套文具为主，上世纪50年代达到鼎盛时期，主要销售对象仍为日本。是什么意思？

Chicken liver after new China stone products, mass production, mainly for vases and complete sets of stationery, 50 reached last century heyday, main sales target for Japan.