Taipei: Intra-Asia operator Wan Hai Lines plunged to a net loss in the second-quarter but managed to remain in the black for the first-half. The Taiwanese box liner posted second-quarter net loss of NT$291m ($10m) as against a net profit of NT$366.9m in the previous quarter. In the first-half, Wan Hai registered net profit of NT$75.9m compared to a profit of NT$1.7bn in the same period last year.Revenue in the first-half came up to NT$29.4bn compared to NT$32.1bn a year ago.