Subsequent events	12 Months Ended
Dec. 31, 2021
Subsequent events	24 Subsequent event On December 16, 2021, the Company announced that the Company’s board of directors authorized the issuance of bonus shares (the “Bonus Shares”), which are issuable on January 21, 2022 to shareholders of record as of January 7, 2022 (the “Record Date”). Shareholders of record on the Record Date will receive one (1) ordinary share for every two (2) ordinary shares held. All issuances resulting in a fractional share will be rounded down to the next whole share. The common stock began trading on a split-adjusted basis on January 24, 2022. The effect of the stock split in form of bonus shares has been reflected retroactively in the financial statements and net income per ordinary share computations.
ZHEJIANG TIANLAN
Subsequent events	22 Subsequent event On April 22, 2022, the director of the Company proposed a cash dividend of an aggregate of approximately RMB9,082,000, which dividend was paid to all holders of record subject to approval in shareholders’ annual general meeting.

The entire disclosure for significant events or transactions that occurred after the balance sheet date through the date the financial statements were issued or the date the financial statements were available to be issued. Examples include: the sale of a capital stock issue, purchase of a business, settlement of litigation, catastrophic loss, significant foreign exchange rate changes, loans to insiders or affiliates, and transactions not in the ordinary course of business.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 855
-URI https://asc.fasb.org/topic&trid=2122774

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 855
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (a)
-URI https://asc.fasb.org/extlink&oid=6842918&loc=SL6314017-165662

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