China's manufacturing sector expanded at its fastest pace in five months in September, according to the RatingDog Manufacturing PMI, which rose to 52.1 from 51.5 in August and beat consensus forecasts of 51.7.

The reading marks a tenth consecutive month above the 50 threshold that separates growth from contraction, and it is the strongest print since April. For carriers and forwarders running export lanes out of Chinese factory hubs — Shanghai, Ningbo, Shenzhen — the signal is that cargo generation from the manufacturing base remains firm heading into the final quarter.

The services gauge also improved. The RatingDog services PMI edged up to 51.6 from 51.4, ahead of expectations of 51.3.

Official data told a similar, if more muted, story. China's official manufacturing purchasing managers' index climbed to 50.1 in September from 49.8 in August, in line with estimates and ending two consecutive months of contraction. The official non-manufacturing PMI rose to 50.2 from 49.0, beating forecasts of 49.2, while the composite PMI covering manufacturing and services advanced to 50.7 from 49.5.

The divergence between the two surveys reflects coverage differences: the official gauge skews toward large and state-owned enterprises, while RatingDog's panel carries greater exposure to smaller and private manufacturers. The fact that both moved higher in September suggests the improvement was broad-based across company sizes — a relevant detail for NVOCCs and consolidators, whose booking volumes often track the smaller private exporters more closely than the state giants do.

ING analysts framed the manufacturing strength as real but unevenly sourced. "Overall, manufacturing has been a relative strength this year, though it has mostly been driven by external demand as domestic consumption and investment lag," they wrote in a note.

That external-demand dependency carries a clear commercial implication for shipping markets: outbound volumes from China are being sustained by export orders rather than internal consumption, which leaves the trade exposed to demand conditions in the US and Europe and to tariff and trade policy shifts in those destinations. Carriers that have anchored capacity to Chinese export lanes on the assumption of steady replenishment demand will be watching orders data from Western buyers closely.

Part of the September rebound also reflects a recovery from disrupted output. Heavy rain and typhoons disrupted production in parts of China in August, depressing that month's base, while advanced manufacturing and exports have remained relatively resilient, according to the source.

The backdrop remains fragile. Domestic demand is weak, the property downturn is prolonged, and consumer spending cautious. Beijing has responded: a State Council meeting chaired by Premier Li Qiang this week pledged a package of measures aimed at stabilising the property market, supporting employment and boosting incomes.

"Measures announced by the State Council earlier this week may help bridge that gap a bit by year-end. But the divergence in China's economy remains clear," analysts said.

On the growth trajectory, ING sees the PMI data pointing to a modest uptick in September's activity data due in a few weeks. "Along with more favourable base effects, this might be enough to help third-quarter GDP recover from the 4.3% we saw in the second quarter," the bank's analysts added.

For shippers, the September PMI prints suggest export cargo flows out of China will hold steady through the shoulder season after the peak-month rush, keeping load factors on major eastbound lanes supported even as carriers manage capacity. Should the external-demand engine weaken, the official stimulus measures will need to do more than "bridge the gap" to keep factory output — and the boxes it fills — on an expansionary footing into 2025.