Enter Open Channel Params
Parameters
count
enter channel Pull message Count, -1 Not Pull, 0 Pull 10 items, at most 50 items, Default -1
extra
Additional info (Default Maximum length 128 characters)
enter channel Pull message Count, -1 Not Pull, 0 Pull 10 items, at most 50 items, Default -1
Additional info (Default Maximum length 128 characters)