Shenzhen Volunteer Day March 5 is Shenzhen Volunteer Day. 2015/3/21   Shenzhen Volunteer Day March 5 is Shenzhen Volunteer Day. In his role as Volunteer Image Ambassador, Mark and the pianist Yi Lundi were invited to produce a short video clip to encourage Shenzhenites to volunteer to help the less needy as well as join in making Shenzhen a better city. The information was shared on Shenzhen’s subway system as well as volunteer events across the city.