Goldsun Building Materials Co., Ltd. Announces Revenue Results for the month of December 2020 and Year to Date. For the month of December 2020, on a consolidated basis, were approximately TWD 2.08 billion, an increase of 22.69% from December 2019. Revenues for January through December 2020 totaled TWD 18.88 billion, an increase of 0.5% compared to the same period in 2019.