They stick to their posts and move the masses with emotion; They shuttle between ordinary alleys to solve people's livelihood problems for residents; They constantly innovate community working methods and mobilize residents to build a "beautiful home". They are community secretaries, grid workers and takeaway boys at the grass-roots level in Liangshan, Shandong Province They have been at the forefront of serving the masses for a long time, not only guarding their own small family, but also silently guarding the community family.