Chinese Premier Wen Jiabao said on Thursday that scientific planning, reasonable designing and orderly development are principles for the country's future railway construction.

The construction should not put sole emphasis on the speed, but should integrate it with quality, efficiency and safety, with the safety always the first priority, Wen said.

Wen made the remarks while speaking to press at the site of the deadly train crash near Wenzhou of eastern Zhejiang Province.