UDC announced through its press release that the total revenue in Q4, 2017 increased 55% to US$ 115.9 million, compared to the same period of the previous year. In addition, the revenue from material sales increased 105% to US$ 59.8 million in the fourth quarter, compared with US$ 29.2 million in the fourth quarter of 2016. Operating income increased by US$ 23.1 million to US$ 57.9 million in the fourth quarter, compared to the same period of 2016.