Short answers, pulled from the story.
An Shigao was a second century Buddhist missionary who migrated from Parthia to China. Some scholars believe he was a prince of Parthia who renounced his royal throne to become a missionary monk in China.
An Shigao arrived in China during the year 148 CE and settled at the Han capital of Luoyang. He established his base there to produce translations of Indian Buddhist texts for a community of followers.
Modern scholarship suggests that thirteen of sixteen texts are reliably ascribed to An Shigao based on research by Stefano Zacchetti. These specific texts include T 13, T 14, T 31, T 32, T 36, T 48, T 57, T 98, T 112, T 150a, T 603, T 607, and T 1508.
Scholarly studies show that An Shigao's translations align most closely with the Sarvastivada school rather than Mahayana. His teachings reflect the doctrinal focus of the Sarvāstivāda group despite early Chinese sources referring to him as a bodhisattva.
Two manuscripts containing four previously unknown works were discovered by Kajiura Susumu in the year 1999. These texts were found in the collection of Kongoji temple located in Osaka Prefecture, Japan.