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As of 2017 the average age of first marriage for women was about 27 and a half, while it was 29 and a half for men. Demographers estimate that about 80 percent of US citizens will marry at some point in their lives. That's much lower than the 95 percent who married in the 1950s and 1960s, according to Stephanie Coontz, a marriage historian and author of Marriage, a History: How Love Conquered Marriage.

As major economies and beneficiaries of free trade, China and Japan should defend the rules-based international order, Li said in Beijing on Tuesday during a meeting with a delegation of Japanese legislators headed by Tadamori Oshima, speaker of the House of Representatives of Japan's parliament.

As part of the country's broader opening-up push, the National Development and Reform Commission said earlier that China will phase out the 50 percent equity cap this year for foreign aircraft manufacturers in joint ventures in China.

As of October 2018, Alibaba's Taobao and Tmall platforms had nearly 30 million middle-aged and elderly online shoppers, the company claimed.

As part of the festivities, the Harbin Ice and Snow World, a 600,000-square-meter park, officially opened for the 20th consecutive year. The park is each winter built with ice rather than commonly used construction materials.