Rongzun International (HKG:1780) expects a post-tax loss of between HK$9.5 million and HK$10.5 million for the year ended March 31, up from HK$9.3 million a year prior, a Tuesday Hong Kong bourse filing said.

The infrastructure service provider attributed the loss mainly to additional subcontracting costs to handle the expected complexity of projects in the alternation & addition work segment.