China Hard Pen Calligraphy Competition is the largest and highest quality hard pen calligraphy competition in China sponsored by China Hard Pen Calligraphers Association. The organizer is China Pen Calligraphy magazine, which is basically held once a year in the compound of Hangzhou Provincial Government.
The "Wenhua Cup" is mainly organized by Pen Calligraphy Newspaper founded in Zou Mubai, Hubei Province, in conjunction with a number of calligraphy magazines and schools, and is basically held once a year.
The specific time can be found on the relevant websites. I hope I can help you.