Prime Minister Lee Hsien Loong held a dialogue for Singaporean technology professionals, attended a Chinese New Year gathering and toured a farmers' market on yet another busy day in San Francisco on Saturday (Feb 13).

In a daily Facebook update on his week-long visit to the United States, Mr Lee said he first conducted dialogue with Singapore tech professionals working in San Francisco.

"Some are working with established companies, while others have their own startups. They were eager to know what is happening in Singapore, especially on the tech front," Mr Lee wrote.

"So I shared with them our plans and hopes for the #SmartNation project."

At a Chinese New Year reception for the Singaporean community, Mr Lee met about 250 students, working professionals and families, some of whom flew in specially from out of state to attend.

He also squeezed in a lunch meeting with a group - including Mr Todd Park, technology adviser to the White House - which worked with the US government on tech issues.

"We talked about what government can learn from the private sector, to do a much better job of using IT," Mr Lee shared.

Earlier in the day, Mr Lee visited the famous Ferry Plaza Farmers Market with his wife Ho Ching, where they had croissants for breakfast.

Mr Lee, who is also accompanied on the trip by Foreign Minister Vivian Balakrishnan, will spend one more day in San Francisco before flying to the Sunnylands estate for a special US-Asean summit on Monday (Feb 15).

He had spent the first two days of his visit meeting the heads of prominent technology firms such as Facebook's Mark Zuckerberg, Apple's Tim Cook, Tesla and SpaceX's Elon Musk, as well as Google's Sundar Pichai.

Besides enjoying a spin in a Google self-driving car and in one of the latest models of the Tesla electric car, Mr Lee also tried out cool gadgets like a virtual reality headset in an Oculus Toybox demo.