BEIJING (Reuters) -Apple's ( AAPL ) smartphone shipments in China plunged 25% in the fourth quarter of 2024, data from research firm Canalys showed, as the iPhone maker faced mounting pressure from a resurgent Huawei in one of its biggest global markets.

The U.S. tech giant shipped 13.1 million units in China during the period, narrowly maintaining its market lead with a 17% share, according to Canalys data released on Thursday.

Huawei captured 17% market share on shipments of 12.9 million units, placing it in a virtual tie with Apple ( AAPL ) for market leadership, the Canalys data showed.

Huawei, which posted a 24% rise in shipments in the fourth quarter, has emerged as a particularly strong challenger since its return to the premium segment in August 2023 with locally-made chipsets.

Apple ( AAPL ) has turned to rare discounts to stimulate sales amid growing competitive pressure. The company launched a four-day promotion in China from Jan. 4-7, offering price cuts of up to 500 yuan ($68.50) on its iPhone 16 models through its official channels.

Major Chinese e-commerce platforms have followed suit with their own promotions. Alibaba's Tmall marketplace announced discounts of up to 1,000 yuan ($137) on iPhone 15 series devices.

"While Apple ( AAPL ) and its iPhone 15 series maintained their leadership in the fourth quarter, they face mounting pressure from domestic flagship devices," Canalys analyst Amber Liu said.

"Beyond seasonal promotions, Apple ( AAPL ) is enhancing its competitive position and user retention in China's premium segment through improved retail experiences, trade-in programs, and expanded interest-free installment plans."

Annual shipments of smartphones in China in 2024 increased 4% year-over-year to 285 million units.