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Zhejiang Tuna Environmental Science & Technology Co.,Ltd. — Investor Relations & Filings

Ticker · 603177 ISIN · CNE100002Z08 LEI · 836800BSZPN219F2GL82 Shanghai Stock Exchange Manufacturing
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Filings indexed 961 across all filing types
Latest filing 2026-05-25 Regulatory Filings
Country CN China
Listing Shanghai Stock Exchange 603177

About Zhejiang Tuna Environmental Science & Technology Co.,Ltd.

https://www.zj-tuna.com/

Zhejiang Tuna Environmental Science & Technology Co., Ltd. specializes in the research, development, and manufacturing of advanced environmental protection equipment and integrated pollution control solutions. The company focuses primarily on atmospheric emission reduction, offering a comprehensive suite of technologies for flue gas desulfurization, denitrification, and particulate matter removal. Its core product portfolio includes selective catalytic reduction (SCR) catalysts, electrostatic precipitators, bag filters, and specialized desulfurization pumps and valves. Beyond air pollution control, the firm provides industrial wastewater treatment systems and solid waste management services. Serving heavy industries such as thermal power generation, metallurgy, and chemical processing, the company delivers end-to-end services encompassing engineering design, equipment fabrication, system installation, and technical maintenance to ensure compliance with stringent environmental standards.

Recent filings

Filing Released Lang Actions
律师意见
Regulatory Filings Classification · 86% confidence The document is a law firm’s legal opinion letter (“法律意见书”) regarding the convening, procedural validity, and voting results of the 2025 Annual General Meeting of Zhejiang Dechuang Environmental Protection Technology Co., Ltd. It is not the AGM notice itself, not the company’s formal voting results announcement, nor a financial report. Instead, it is a legal compliance opinion furnished by external counsel, which does not fit into any specific category above. Therefore it falls into the general fallback category ‘Regulatory Filings’ (RNS).
2026-05-25 Chinese
603177：德创环保2025年年度股东会会议资料
AGM Information Classification · 95% confidence The document is titled “2025年年度股东会 会议资料” and contains the meeting guidelines, agenda, and detailed proposals for the 2025 Annual General Meeting of Zhejiang Dechuang Environmental Technology Co., Ltd., including instructions for shareholders, proposal texts, and attachments. This is exactly the set of materials shared at an AGM and matches the definition of AGM Information (Code: AGM-R).
2026-05-14 Chinese
董事会议事规则（2025年10月修订）
Governance Information Classification · 100% confidence The document is titled '董事会议事规则' which translates to 'Rules of Procedure for the Board of Directors' of Zhejiang Dechuang Environmental Protection Technology Co., Ltd. It details the responsibilities, duties, meeting procedures, voting rules, and governance structure of the company's board of directors. There is no financial data, earnings information, or report publication mentioned. The content is focused on internal governance rules and board management practices. Therefore, this document fits the category of Governance Information (CGR). The document length is over 10,000 characters, indicating it is a full document, not a brief announcement or certification.
2025-10-30 Chinese
内部审计制度（2025年10月修订）
Audit Report / Information Classification · 95% confidence The document is titled as an internal audit system of Zhejiang Dechuang Environmental Protection Technology Co., Ltd. It details the internal audit organization, responsibilities, procedures, internal control evaluation, and audit report management. It references laws and regulations related to auditing and internal control, and describes the company's internal audit framework and processes. The document is a comprehensive internal audit policy and procedure manual rather than a standalone audit report or financial statement. It does not contain financial data or audit results but rather the internal audit system and governance. Therefore, it fits best under Audit Report / Information (AR), which includes applied accounting principles and internal audit information but excludes full annual reports. The document length (7536 characters) supports it being a full policy document rather than a brief announcement or certification. Hence, the classification is AR with high confidence. FY 2025
2025-10-30 Chinese
603177：德创环保2025年三季度环保行业经营性信息简报
Regulatory Filings Classification · 95% confidence The document is a quarterly operational information brief for the environmental protection industry, covering the period from January to September 2025. It provides details on new orders and order backlog amounts but does not contain comprehensive financial statements or detailed financial analysis. The document length is short (524 characters), and it is an operational update rather than a full interim or quarterly financial report. Therefore, it does not meet the criteria for an Interim/Quarterly Report (IR). It is more aligned with a Regulatory Filing (RNS) as a general regulatory announcement or operational update that does not fit other specific categories.
2025-10-30 Chinese
内幕信息知情人登记管理制度（2025年10月修订）
Governance Information Classification · 100% confidence The document is a detailed internal management system for insider information registration and confidentiality at Zhejiang Dechuang Environmental Protection Technology Co., Ltd. It outlines the scope, responsibilities, procedures, and legal compliance related to insider information and insider information persons. It includes detailed rules on confidentiality, reporting, and record-keeping of insider information, as well as attachments for insider information person records and major event progress memoranda. There is no financial data, earnings information, or report publication announcement. The document is a governance-related internal policy document focused on compliance and internal controls regarding insider information. Therefore, it fits best under Governance Information (CGR).
2025-10-30 Chinese

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