A resident swims in a pool carved from ice on the frozen Songhua river in Harbin in northeastern China's Heilongjiang province, Tuesday, Jan. 7, 2025. (AP Photo/Andy Wong)

A woman passes a towel to a swimmer after she swims in a pool carved from ice on the frozen Songhua river in Harbin in northeastern China's Heilongjiang province, Tuesday, Jan. 7, 2025. (AP Photo/Andy Wong)

A man jumps into a pool carved from ice on the frozen Songhua river in Harbin in northeastern China's Heilongjiang province, Tuesday, Jan. 7, 2025. (AP Photo/Andy Wong)

A resident jumps into a pool carved from ice on the frozen Songhua river in Harbin in northeastern China's Heilongjiang province, Tuesday, Jan. 7, 2025. (AP Photo/Andy Wong)

A resident prepares to swim in a pool carved from ice on the frozen Songhua river in Harbin in northeastern China's Heilongjiang province, Tuesday, Jan. 7, 2025. (AP Photo/Andy Wong)

Yu Xiaofeng leaps as she jumps into a pool carved from ice on the frozen Songhua river in Harbin in northeastern China's Heilongjiang province, Tuesday, Jan. 7, 2025. (AP Photo/Andy Wong)

A woman looks out from a changing room as she prepares to swim in the frozen Songhua river in Harbin in northeastern China's Heilongjiang province, Tuesday, Jan. 7, 2025. (AP Photo/Andy Wong)

Residents prepare to swim in a pool carved from ice on the frozen Songhua river in Harbin in northeastern China's Heilongjiang province, Tuesday, Jan. 7, 2025. (AP Photo/Andy Wong)

Residents watch a woman jump into a pool carved from ice on the frozen Songhua river in Harbin in northeastern China's Heilongjiang province, Tuesday, Jan. 7, 2025. (AP Photo/Andy Wong)

A man swims in a pool carved from ice on the frozen Songhua river in Harbin in northeastern China's Heilongjiang province, Tuesday, Jan. 7, 2025. (AP Photo/Andy Wong)

A woman jumps into a pool carved from ice on the frozen Songhua river in Harbin in northeastern China's Heilongjiang province, Tuesday, Jan. 7, 2025. (AP Photo/Andy Wong)

A man jumps into a pool carved from ice on the frozen Songhua river in Harbin in northeastern China's Heilongjiang province, Tuesday, Jan. 7, 2025. (AP Photo/Andy Wong)

A man chats with residents in winter clothings as he prepares to swim in a pool carved from ice on the frozen Songhua river in Harbin in northeastern China's Heilongjiang province, Tuesday, Jan. 7, 2025. (AP Photo/Andy Wong)

A man puts on his head cover as he prepares to swim in the frozen Songhua river in Harbin in northeastern China's Heilongjiang province, Tuesday, Jan. 7, 2025. (AP Photo/Andy Wong)

A man jumps into a pool carved from ice on the frozen Songhua river in Harbin in northeastern China's Heilongjiang province, Tuesday, Jan. 7, 2025. (AP Photo/Andy Wong)

Residents watch a man preparing to swim in the frozen Songhua river in Harbin in northeastern China's Heilongjiang province, Tuesday, Jan. 7, 2025. (AP Photo/Andy Wong)

A woman reacts as she gets into a pool carved from ice on the frozen Songhua river in Harbin in northeastern China's Heilongjiang province, Tuesday, Jan. 7, 2025. (AP Photo/Andy Wong)

Residents in winter clothing watch Yu Xiaofeng pose as she prepares to swim in a pool carved from ice on the frozen Songhua river in Harbin in northeastern China's Heilongjiang province, Tuesday, Jan. 7, 2025. (AP Photo/Andy Wong)

Residents watch a woman swim in a pool carved from ice on the frozen Songhua river in Harbin in northeastern China's Heilongjiang province, Tuesday, Jan. 7, 2025. (AP Photo/Andy Wong)

Residents swim in a pool carved from ice on the frozen Songhua river in Harbin in northeastern China's Heilongjiang province, Tuesday, Jan. 7, 2025. (AP Photo/Andy Wong)