《旧唐书·本纪·卷十三》
二十八日，各州准许他们按旧例举荐隐居山丘园林不求做官成名的蔡广成等九人，各个授予官职试用，命令给他们乘公家车的权利，到京师后再量才录用。
丙申，诸州准例荐隐居丘园不求闻达蔡广成等九人，各授试官，令给公乘，到京日量才叙用。
On the 28th day, all states were allowed to recommend nine people such as Cai Guangcheng who live in seclusion in the mountains or gardens and did not seek fame or fortune, as they have done in the past. They would be given official positions for probation and the right to ride government cars. Once they reached the capital, they would be employed according to their talents.