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Boeing has about 4,500 MAX jets on order. Some airlines plan to take delivery of new planes as quickly as Boeing can build them after recertification, but others may move slowly.

Blue bonds are debt instruments issued to raise capital from impact investors to finance marine and ocean-based projects that have positive environmental, economic and climate benefits.

Boasting the fifth largest forest area in the world, China aims to expand its forest cover to more than 23 percent by 2020 to combat climate change and soil erosion. The forest coverage was 21.7 percent at the end of 2016.

Both Republican and Democrat lawmakers reaffirmed on Thursday the United States' "commitment" to democracy and human rights in Hong Kong and "warned" Beijing against its "increased interference" in the territory. US senators and representatives also introduced a "Hong Kong Human Rights and Democracy Act", a measure that could lead to the removal of Hong Kong from the US' special trading partners' list.

BigTech in finance usually means the financial services offerings of technology companies with established presences in the digital services market. A report released by a national think tank last week said these kinds of companies may bring new types of risks to the financial system, and questioned whether the risks are significant of study.