I just found some hand-written training notes from about 20 years ago. These were observations from a coach who went to China to train with some top-level players.

Trouble is, the writing is mine and it is pretty scrappy. I made these notes while listening on the phone and it looks like I couldn't keep up.

Nevertheless, here it is. Some of it may not make sense, but I'm not interpreting, I'm just typing what I can read:

• Short strokes, good waist on every forehand (subtle) [even Swedes have compact strokes]
• wrist breaks on every backhand with short follow through
• no backswing for backhand counter hit
• wide stance, feet very square to table, work done with waist
• balls wide to forehand approached by moving right foot wider, power from waist, stomach very tight
• great muscle tone in Chinese, rippled stomach always
• Chinese very relaxed when ball hit hard to them; short, full stroke to return as usual
• Serves:
  • long or short serve is same stroke
  • fast serves must be very fast
  • vary spin with stroke
  • short serves must look same as others and be fast
  • placement and disguise of placement are essential and should be accomplished by racket angle only
  • high toss: toss ball then watch opponent
  • high toss: power comes from close to the body
  • thin contact is key to short serves
  • Purpose
  • multi-ball training for serves

• Physical training:

  Four times a week:

  • running 3x60m, 2x100m, 1x400m, 1x800m, five mile run
  • shuttle runs
  • skipping 5x(200 right, 200 left, 200 both feet)
  • 100-200 V sits
  • 100-200 situps
  • 100-200 back raises
  • 5x1minute tight twisting

  Once a week: free weights, total body, all muscle groups, 20-30 reps at high rate.

  Three weeks prior to major competition, the above is reduced by half.