China's Hainan Strait Shipping is forecasting a big rise in earnings for the first half of this year.

The ro-pax owner said net profit to 30 June could jump between 30% and 80%.

This could see it bank between CNY 151.3m ($21.97m) and CNY 209.4m, against CNY 116.3m in the same period of 2016.

It attributed this to increased revenue from its transport business.

The owner has a fleet of 27 passenger and car ferries.