About $121.1 billion-worth of Hong Kong's total exports to the Mainland in the second quarter were for outward processing, up 10% on the same period last year, the Census & Statistics Department says.

The value of domestic exports to the Mainland for outward processing fell 7% to $5.4 billion while the value of re-exports rose 11% to $115.6 billion.

The value of imports from the Mainland related to outward processing grew 11% to $206.9 billion, while $204.1 billion of the city's re-exports of Mainland origin to other places were produced through outward processing on the Mainland, up 4%.

In the first half of the year $224.4 billion of Hong Kong's total exports to the Mainland were for outward processing, up 15% over the same period of last year. The value of domestic exports to the Mainland for outward processing fell 13% to $9.1 billion while re-exports rose 16% to $215.3 billion.