Patrick Frater Asia Bureau Chief“The Battle at Lake Changjin II” continued its domination of the mainland Chinese box office into a third week. But cinemagoing activity continued to slow down after peaking at the beginning of the month with the Lunar New Year holidays.Hollywood new release “Death on the Nile” did not have enough impact to make it beyond fourth place or to change the overall direction of the market. “Lake Changjin II” earned $19.8 million over the weekend, according to data from consultancy Artisan Gateway.