Hainan Development Holdings Surges 56% After Free‑Trade Port Launch, No Hidden Info Disclosed

Hainan Development Holdings Nanhai Co Ltd

Market‑level context

The Shenzhen‑listed construction and engineering company, Hainan Development Holdings Nanhai Co Ltd (ticker SZ002163), has been the focus of market attention this week. Its shares ended the trading day on December 26, 2025 at a limit‑up price, registering a 9.68 % intraday price increase. The daily turnover reached 50.63 billion CNH, giving the stock a daily turnover ratio of 28.37 %.

On the same day, the stock’s institutional side of the order book recorded a net sell of 29.307 million CNH, while the overall net sell from all brokerage‑level desks reached 147 million CNH.

Abnormal price movement and regulatory review

On December 28, 2025, the company issued a formal notice confirming that its closing price had deviated from the 20 % threshold over three consecutive trading days (December 24‑26). According to the Shenzhen Stock Exchange rules, this constitutes an abnormal trading‑price fluctuation event.

The notice stated the following:

1. No need for information correction or supplementation – All information previously disclosed by the company is accurate and complete.
2. No undisclosed material information – No public media reports or unpublished material could have materially affected the stock price.
3. Stable operating environment – The company’s recent operating results and its external business environment have not experienced any significant changes.
4. No undisclosed major events – Neither the company, its controlling shareholder, nor its actual controller have any undisclosed material matters or pending major plans that would warrant disclosure.
5. No insider trading – The controlling shareholder and actual controller did not buy or sell the company’s shares during the abnormal period.

The board confirmed that, under the current circumstances, there is no other information that should be disclosed to the public.

Impact of the Hainan Free‑Trade Port launch

The company’s share price movement coincides with the formal launch of the Hainan Free‑Trade Port on December 18, 2025, when the island entered full‑scale border‑closure operations. According to the Sanya Municipal Commerce Bureau, the first day of the border‑closure recorded tax‑free sales of 1.18 billion CNH.

Key policy measures that could influence the company include:

• Zero‑tariff status for 74 % of imported goods – This eases procurement costs for construction materials.
• Enhanced tax‑free and customs‑free regimes – These measures broaden market access and reduce operating expenses for companies engaged in the free‑trade zone.
• Expansion of duty‑free retail coverage – The extended radius of duty‑free retail outlets increases consumer footfall and potential demand for construction and engineering services.

Given that Hainan Development Holdings Nanhai Co Ltd specialises in curtain‑wall engineering, metallic doors, windows and related products, the policy environment may support future contract opportunities within the free‑trade zone.

Market performance relative to sector peers

In the week ending December 28, 2025, the company’s share price rose by 56.46 %. This performance places it among the top performers in the Hainan free‑trade concept sector, alongside peers such as Shen Nong Agriculture (35.69 % weekly gain).

The broader market context:

• Shanghai Composite Index – Up 1.88 % for the week.
• Shenzhen Component Index – Up 3.53 %.
• ChiNext Index – Up 3.90 %.

The battery, military‑electronics and industrial‑metals sectors were also notable contributors to market gains during the same period.

Summary of key facts

The company has complied with regulatory requirements regarding abnormal trading‑price fluctuations, confirmed no material undisclosed information, and highlighted that the recent free‑trade port policy changes may create favourable operating conditions for its core engineering and manufacturing activities.