This was in 1999 long before she became CEO of Solar Records. She was hired as part of Overlord X's marketing team. X offered her a long term position in his company but Tsang left to join United Business Media.
This took place in 1999 prior to Tsang's appointment as Solar Records' CEO. She was initially part of Overlord X's marketing team before he proposed a long-term contract with her, which she declined to accept and instead joined United Business Media.