U.S. House of Representatives Speaker Nancy Pelosi attends a meeting with Taiwan President Tsai Ing-wen at the presidential office in Taipei, Taiwan August 3, 2022. Taiwan Presidential Office/Handout via REUTERS

BEIJING, Aug 3 (Reuters) - China on Wednesday suspended exports of natural sand to Taiwan and halted imports of fruit and fish products from the self-governed island as U.S. House of Representatives Speaker Nancy Pelosi visited Taiwan in a trip condemned by Beijing. read more

In a warning salvo ahead of Pelosi's visit, Chinese customs had suspended imports from 35 Taiwanese exporters of biscuits and pastries since Monday. read more

In January-June, China's imports from Taiwan reached $122.5 billion, up 7.3% from a year earlier, Chinese customs data showed. Top imported goods included integrated circuits and electronic components.

China's commerce ministry said exports of natural sand - widely used for construction and in concrete - to Taiwan were suspended from Wednesday.

Such a move was based on laws and regulations, the ministry said, without elaborating.

In March 2007, China halted exports of natural sand to Taiwan due to environmental concerns. The ban lasted for a year. According to Chinese official data, more than 90% of Taiwan's natural sand imports came from China in 2007.

China also halted imports of citrus fruit, chilled white striped hairtail and frozen horse mackerel from Taiwan from Wednesday, a suspension which it said was due to pesticide residue found on citrus fruit, while traces of the novel coronavirus were detected on the packaging of some frozen fish products in June.

China's top food and agricultural imports from Taiwan include seafood, coffee, dairy products, beverages and vinegar.

In January-June, China's biggest agricultural and food import items from Taiwan were fish and other aquatic invertebrates, reaching 399 million yuan ($59 million).

Earlier this year, China suspended imports of grouper fish from Taiwan, saying it had detected banned chemicals.

Last year, Beijing also suspended pineapple, sugar apple and wax apple imports from the island, citing pest concerns. read more

China also vowed to take "disciplinary actions" against two Taiwan foundations which it claimed had aggressively engaged in pro-independence separatist activities.

The two foundations - Taiwan Foundation for Democracy and Taiwan Foreign Ministry's International Cooperation and Development Fund - will be banned from cooperating with any organisations, companies and individuals in the mainland, China's state news agency Xinhua on Wednesday cited Ma Xiaoguang, spokesman of China's Taiwan Affairs Office, as saying.

China will punish any mainland organisations, companies and individuals that provide financial support to or serve the two foundations, Xinhua reported, adding other measures will be adopted if necessary.

In addition, any deal or cooperation between four specific Taiwanese firms and mainland companies are not allowed due to their donations to the two foundations.

Executives at the four Taiwanese companies - solar producer Speedtech Energy Co., Hyweb Technology Co., medical equipment producer Skyla, and cold chain vehicle fleet management company SkyEyes - will be prohibited from entering mainland China.

Our Standards: The Thomson Reuters Trust Principles.

Malaysian former Prime Minister Najib Razak starts his final attempt on Monday to set aside his conviction in a corruption case linked to the multi-billion dollar 1MDB financial scandal.

Reuters, the news and media division of Thomson Reuters, is the world’s largest multimedia news provider, reaching billions of people worldwide every day. Reuters provides business, financial, national and international news to professionals via desktop terminals, the world's media organizations, industry events and directly to consumers.

Build the strongest argument relying on authoritative content, attorney-editor expertise, and industry defining technology.

The most comprehensive solution to manage all your complex and ever-expanding tax and compliance needs.

The industry leader for online information for tax, accounting and finance professionals.

Access unmatched financial data, news and content in a highly-customised workflow experience on desktop, web and mobile.

Browse an unrivalled portfolio of real-time and historical market data and insights from worldwide sources and experts.

Screen for heightened risk individual and entities globally to help uncover hidden risks in business relationships and human networks.

All quotes delayed a minimum of 15 minutes. See here for a complete list of exchanges and delays.