TRADE RELATIONS between the mainland and Hong Kong have been tried and tested since the founding of the People's Republic 55 years ago.
Re-exports from the mainland helped Hong Kong recover after the second world war, but this link was severed by trade sanctions imposed by the west during the Korean war.
Trade relations resumed in the 1980s with the opening up of China and the country's reform programme, which encouraged Hong Kong manufacturers to move export processing across the border to tap the mainland's cheap labour and land.
In return, conglomerates backed by the mainland government made their presence felt in Hong Kong by getting more involved in the local economy.
They invested in Hong Kong transportation and warehousing, property development, banking, tourism, construction, international trade, retailing and wholesaling.
The investment continued to the extent that today Hong Kong is the biggest recipient of overseas direct investment from mainland enterprises, accounting for 74 per cent of the accumulated US$33.4 billion up to last year.