The chairman of Hong-Kong-based UniVision Engineering bought shares in the company on Wednesday as a sign of confidence in improving business conditions for 2015.Stephen Sin Mo Koo, the chief of the electronic equipment firm, spent £14,550 to acquire 1.5m new shares.After buying the shares at an individual price of 0.97p, the Mo Koo was left holding a total of 279.7m shares, representative of 72.9%.The businessman said in the group's interim report last month that, despite a drop in profits for the first half of the year, new infrastructure projects would "support growth of the group's income in future years".In 2014 UniVision registered a decline in revenue to £3.1m from £4.4m the year before, as a result of worsening conditions at its Taiwan construction business. The chief factor behind the above was the decrease in job orders and delays to projects driven by a budget reduction at a major local customer.Top Director BuysWhitbread (WTB) Director name: Mr Nicholas Cadbury Amount purchased: 325 @ 4,658.13p Value: £15,139UniVision Engineering Ltd. (UVEL) Director name: Mr Stephen Sin Mo KooAmount purchased: 1,500,000 @ 0.97p Value: £14,550BlackRock Commodities Income Inv Trust (BRCI) Director name: Mr Edmond (Ed) William WarnerAmount purchased: 12,000 @ 88.60p Value: £10,632Top Director SellsCapital Lease Aviation (CLA) Director name: Mr Peter Anthony FreemanAmount sold: 110,000 @ 20.50p Value: £22,550