News At Seven-Thirty highlights:Man goes missing while stream-trekking in Sha Tau Kok;A man went missing while fishing at the Plover Cove Reservoir in Tai Po;Higher taxi fares went into effect today;Potential CE candidates state their stance;Different parties express the opinions about possible CE candidates;News of the World publishes last edition;New 7.0 quake hits northeastern Japan, no reports of casualties;U.S. top military officer in Beijing expresses worry;China promises support for new government in South Sudan;Newspaper delivery lorry crashes into road maintenance trucks on Yuen Long Highway, driver killed;Last racing day this season.