London (CNN Business) 1. Back to business in China: Markets in mainland China zoomed higher Monday as investors returned from a week-long break for Lunar New Year.

The Shanghai Composite gained 1.4% during the first day of trading in the Year of the Pig. The tech-heavy Shenzhen Composite added nearly 3%.

This is a big week in the trade conflict between the United States and China.

Trade talks between the countries have resumed, with US Trade Representative Robert Lighthizer and US Treasury Secretary Steven Mnuchin set to travel to Beijing for discussions later this week.

Trump has threatened to increase existing tariffs and enact a third wave of penalties on Chinese goods if the two sides can't broker a permanent truce before the March 1 deadline.