HA NOI (VNS)  — Positive Mass is an event inspired by an international event called Critical Mass, aiming to promote cycling for all its positive reasons. Critical Mass is a cycling event typically held on the last Friday of every month in over 300 cities around the world. The ride was originally founded in 1992 in San Francisco. The purpose of Critical Mass is not usually formalised beyond the direct action of meeting at a set location and time and travelling as a group through cities or towns on bikes.

In Ha Noi, Positive Mass is called Dap Cho Suong, literally meaning cycling for pleasure. Bikers meet on the last Friday of every month at St. Joseph's Cathedral and travel around the city following a prepared route that ends back at the cathedral. The first Positive Mass in Ha Noi started in October 2012. Since October 2013, Positive Mass expanded to HCM City, Thai Nguyen and Son La.

This month's Dap Cho Suong – Positive Mass will be held at 8pm on Friday, May 30.— VNS