Message : Required fields SHANGHAI, June 5 (Reuters) - Foreign investors held a record amount of Chinese yuan bonds at the end of May, official data showed, as a strengthening yuan increased the appeal of Chinese assets. Holdings by offshore investors of bonds traded in China's interbank market stood at 3.68 trillion yuan at the end of May, according to Reuters calculations using data released on Friday evening by China Central Depository & Clearing Co and the Shanghai Clearing House. That was up 1.7%, or 61.47 billion yuan, from a month earlier. Offshore investors held a record 2.12 trillion yuan of Chinese government bonds at the end of May, up 1.2% from April