Which of the following were the reasons for Hong Kong’s production lines moving to the Mainland?
(1)The implementation of quota systems in some Western countries affected the sales of Hong Kong products.
(2)The Mainland has a better legal system than Hong Kong, which attracted investment from businessmen.
(3)Increasing production costs in Hong Kong undermined the competitiveness of Hong Kong’s exports.
(4)The lower rents and wages in the Mainland attracted many Hong Kong manufacturers to develop there.