On he third mission, she discovered a system which she named Shensi system with 8 planets (named after her home province). On Sian (Shensi 4), she found the remains of a Heechee settlement from which she retrieved 5 spools of monofilament wire. She received $3 million and stayed on Gateway long enough to collect it and retired to Shensi province.
The ware later proved to have remarkable properties, like immense strength and low weight. A spool the size of a fist of this wire could have 500kms of it. The wire was reverse-engineered and then licensed to two multinational corporations for industrial production.