TOKYO: Chinese teenager Zhang Zhanshuo won a record seventh swimming gold at the Asian Games on Friday (Sep 25) and said it had been the “perfect conclusion” to his week in Tokyo.The 19-year-old wrapped up a scintillating campaign with victory in the 400m freestyle in a Games-record 3min 41.28sec.No swimmer had previously won seven golds in one Games.Japan’s Rikako Ikee won six in Jakarta in 2018 before China’s Zhang Yufei matched her achievement in Hangzhou five years later. Zhang Zhanshuo went one better and said he was “calmer than I imagined I would be”.”The moment I touched the wall was…