Discontinued Operations (Details) - HKD
HKD in Thousands
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]      
Cash and cash equivalents HKD 0 HKD 163,696 HKD 224,411
Trade receivables, net   303,681  
Inventories   105,221  
Deposits, prepayment and other receivables   42,345  
Tax prepayment   3,431  
Current assets of discontinued operations 0 618,374  
Property, plant and equipment, net   190,776  
Deferred tax assets   13,260  
Non-current assets of discontinued operations 0 204,036  
Total assets of discontinued operations   822,410  
Bank borrowings   29,223  
Trade payables   111,659  
Other payables and accruals   141,606  
Tax payable   65,107  
Current liabilities of disposal liabilities HKD 0 347,595  
Total liabilities of disposal liabilities   HKD 347,595