《旧唐书·列传·卷一百零九》
他认为原有盐专卖法年久弊深，欲转为官府自卖，可富国强兵，劝勉农事，积蓄资财，便上疏十八条陈说利害。
以榷盐旧法，为弊年深，欲官自粜盐，可富国强兵，劝农积货，疏利害十八条。
Zhang Pingshu regarded the original salt monopoly system as a cause of trouble, and proposed to sell salt through official representatives to strengthen the country and military, encourage agriculture and accumulate wealth. He presented an eighteen-point memorial discussing the pros and cons.