China's Dalian Success Innovation Group (DSIG) has inked another domestic dry cargo vessel order to boost its owned fleet.

Brokers list the company as inking a deal for four 22,500-dwt bulkers at Fujian Southeast Shipbuilding for delivery in 2021.

A price has not been revealed, but UK broker Clarksons estimates a ship of this size would cost below $21m.

The group made its first newbuilding move at the end of 2017, signing up for 10 ships of 25,800 dwt at DSIC-linked Dalian Shipbuilding Industry's Changxing Shipyard.