Border checkpoints are to open for longer to ease growing passenger and vehicle congestion.
The agreement was one of a series reached during a half-day meeting of the Hong Kong and Guangdong Co-operation Joint Conference in Hong Kong yesterday.
Hong Kong team leader Anson Chan Fang On-sang said the meeting had provided the basis for further co-operation.
'We feel we have established a very sound basis to strengthen co-operation between the two sides and in this way we can improve the benefits for both sides,' the Chief Secretary for Administration said.
Guangdong Vice-Governor Wang Qishan was confident the prospects for co-operation were bright.
The agreements reflected the common demand for economic and social links.
The opening hours of the four land crossings will be extended by one to two hours. Goods vehicles will be allowed to choose crossing points for entry and exit.