Mainland ports continued to report double-digit growth in container throughput last month, but the ports of Hong Kong and the Pearl River Delta have yet to return to pre-crisis levels, reported the South China Morning Post.

The container throughput of mainland ports rose 24 per cent from

May last year to 11.7 million TEUs, the Ministry of Transport.

Ningbo, the fourth-largest port, posted its highest-ever container throughput at 1.22 million TEUs, a 51.4 per cent year-on-year rise, according to the port's authorities. Ningbo's container exports soared 35 per cent to 480,000 TEUs last month.