Vinegar: You should choose Haitian or Chimei Zhai. Good quality, guaranteed. Haitian is a little sweet, and lobster sauce is a little sour. It is recommended to use both, which is neither sour nor too sweet. Be sure to use Tianding sweet vinegar. Sweet and sour vinegar tastes sour, sweet and flat, and can dissipate blood stasis, stop bleeding, replenish blood, strengthen tendons and bones. It is better to use sweet vinegar.