中美第一阶段贸易协议在1月15日签署后一个月生效，协议中规定双方高层组成的贸易框架小组，每半年应举行一次会谈。
The first phase of the trade agreement, which took effect a month after it was signed on Jan 15, stipulates that high-level trade framework groups from both sides should hold talks every six months.