訪中 （ホウチュウ） visit to China

訪欧 （ホウオウ） visit to Europe, visiting Europe

歴訪 （レキホウ） round of calls, tour of visitation

採訪 （サイホウ） research visit, visit to collect data (esp. historical, folklore, etc.)

訪れる （おとずれる） to visit, to call on, to arrive (of a season, situation, etc.), to come, to appear

訪ねる （たずねる） to visit, to call on, to pay a visit to

問う （とう） to ask, to inquire, to blame (someone) for, to accuse of, to pursue (question of responsibility), to charge with, to care about, to regard as important, to call into question, to doubt, to question