The men were all detained in March 1997, six months after a brutal attack on a family in Dazhou village, Anhui province, which resulted in the death of Zhou Suhua and injuries to her parents, brother and sister.
The meeting also approved documents including the working rules of the Foreign Affairs Commission of the CPC Central Committee.
The meetings, chaired by the premier, discussed State-level policies and guidelines, and about one-third of them produced concrete guidelines to remove institutional hurdles and create a more comfortable environment for investment from both home and abroad.
The ministry vowed to continue crackdown on illegal fundraising and safeguard the legitimate rights and interests of the people.
The massive infrastructure project, which was implemented by China Road and Bridge Corporation, affiliated with China Communications Construction Company, is also deemed an early result of the China-proposed Belt and Road Initiative.
The meeting will help develop a favorable legal environment and build a community of a shared future for humanity, Xi said in the letter, praising the meeting theme of cyberspace governance.
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The meeting between President Xi Jinping and US President Donald Trump over the weekend "bought valuable, though limited, time for themselves and the world", he said.
The meeting will also bring together Lao Prime Minister Thongloun Sisoulith, Thai Prime Minister Prayut Chan-o-cha, Vietnamese Prime Minister Nguyen Xuan Phuc, and Myanmar Vice President Myint Swe.
The measure calls for public hearings and the release of transcripts from closed-door proceedings. It also outlines what rights Republican lawmakers and Trump himself would have to participate as the process moves ahead.
The ministry will continue to ramp up support to make sure the country's pork production returns to as close to the normal level, he added.