1. Chiyambi cha Tsiku la Ogwira Ntchito
Chiyambi cha tchuthi cha Tsiku la Ogwira Ntchito ku China chimachokera pa 1 Meyi, 1920, pomwe chiwonetsero choyamba cha Tsiku la Ogwira Ntchito ku China chinachitika ku China. Chiwonetserochi, chomwe chinakonzedwa ndi China Federation of Labor Unions, cholinga chake chinali kulimbikitsa ufulu wa ogwira ntchito ndikukonza momwe amagwirira ntchito. Kuyambira pamenepo, 1 Meyi yakhala ikukondwerera Tsiku la Ogwira Ntchito Padziko Lonse padziko lonse lapansi, ndipo China yasankha tsikuli ngati tchuthi chovomerezeka cha anthu onse kuti ilemekeze ndikuzindikira zopereka za ogwira ntchito ku anthu. Mu 1949, pambuyo pa kukhazikitsidwa kwa People's Republic of China, boma la China linalengeza 1 Meyi ngati tchuthi cha dziko lonse, chomwe chimalola ogwira ntchito kukhala ndi tsiku lopuma ndikukondwerera zomwe akwaniritsa. Pa nthawi ya Kusintha kwa Chikhalidwe kuyambira 1966 mpaka 1976, tchuthichi chinayimitsidwa chifukwa cha malingaliro aboma motsutsana ndi chilichonse chomwe chimawonedwa ngati bourgeois. Komabe, pambuyo pa kusintha kwa 1978, tchuthichi chinabwezeretsedwanso ndipo chinayamba kudziwika kwambiri. Masiku ano, tchuthi cha Tsiku la Ogwira Ntchito ku China chimakhala kwa masiku atatu kuyambira 1 Meyi mpaka 3 Meyi ndipo ndi chimodzi mwa nthawi zotanganidwa kwambiri paulendo wa chaka. Anthu ambiri amagwiritsa ntchito nthawi yopuma paulendo kapena kukhala ndi mabanja awo. Mwachidule, tchuthi cha Tsiku la Ogwira Ntchito ku China sichimangokhala chikondwerero cha zopereka za ogwira ntchito komanso chikumbutso cha kufunika kopitiliza kukonza mikhalidwe yantchito ndikuteteza ufulu wa ogwira ntchito.