The date of 227 given in the CSZJJ preface (probably by Zhi Qian) to T210 for the date of the arrival of Weiqinan in China, after which Zhi Qian and Jiangyan translated the text.
[Nattier 2008] Nattier, Jan. A Guide to the Earliest Chinese Buddhist Translations: Texts from the Eastern Han 東漢 and Three Kingdoms 三國 Periods. Bibliotheca Philologica et Philosophica Buddhica X. Tokyo: The International Research Institute for Advanced Buddhology, Soka University, 2008.
Nattier, Jan. A Guide to the Earliest Chinese Buddhist Translations: Texts from the Eastern Han 東漢 and Three Kingdoms 三國 Periods. Bibliotheca Philologica et Philosophica Buddhica X. Tokyo: The International Research Institute for Advanced Buddhology, Soka University, 2008.