China’s annual mass migration ahead of the Lunar New Year will peak with billions of trips anticipated during this year’s holiday, which begins Tuesday. An estimated 9 billion trips are expected. This year’s holiday lasts from Jan. 28 through Feb. 4 and marks the arrival of the Year of the Snake. Authorities in China extended the annual break an extra day, so the public holiday will last eight days this year. During the holiday, travel is expected to pick up domestically and internationally. The government said it expects trips by train to surpass 510 million, with 90 million more traveling